Wool and Silk area)Mixed fibresb)Organic fibresc)Synthetic fibresd)Natural fibresCorrect answer is option 'D'. Can you explain this answer?

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Natural fiber

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Types of Fibres
There are mainly four types of fibres:

1. Natural Fibres:
These are the fibres that are obtained from plants and animals. They can be further divided into two categories:

a) Vegetable Fibres:
These fibres are obtained from different parts of plants such as fruits, stem, leaves, roots, etc. Examples of vegetable fibres are cotton, jute, linen, hemp, etc.

b) Animal Fibres:
These fibres are obtained from the hair or fur of animals. Examples of animal fibres are wool, silk, etc.

2. Synthetic Fibres:
These are the fibres that are not obtained from any natural source. They are made in factories using chemicals. Examples of synthetic fibres are polyester, nylon, acrylic, etc.

3. Organic Fibres:
These are the fibres that are grown without using any harmful chemicals or pesticides. Examples of organic fibres are organic cotton, bamboo, hemp, etc.

4. Mixed Fibres:
These are the fibres that are made by combining two or more types of fibres. Examples of mixed fibres are polycotton, viscose rayon, etc.

Correct Answer:
The correct answer to the given question is option 'D' which is Natural Fibres. Wool and silk are both natural fibres obtained from animals.

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Natural fibres

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Wool and silk are natural fibres.

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Natural fibre

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Natural firbres because Natural fibres are divided into two categories 1. Plant fibres 2. Animal fibres

So, Wool is obtained from sheep and silk is obtained from silkworm. Sheep and silkworm are considered as animals. Hence, wool and silk are considered as animal fibers which is also known as Natural fibres.

So, correct answer is D.

Kindly upvote my answer if i am correct

Answer

Animal fibers are natural fibers that consist largely of particular proteins. Examples include silk, hair/fur (including wool) and feathers. The animal fibers used most commonly both in the manufacturing world as well as by the hand spinners are wool from domestic sheep and silk. Also very popular are alpaca fiber and mohair from Angora goats. Unusual fibers such as Angora woolfrom rabbits and Chiengora from dogs also exist, but are rarely used for mass production.

Not all animal fibers have the same properties, and even within a species the fiber is not consistent. MERINO is a very soft, fine WOOL, while COTSWOLD is coarser, and yet both Merino and Cotswold are types of SHEEP. This comparison can be continued on the microscopic level, comparing the diameter and structure of the fiber. With animal fibers, and NATURAL FIBRES in general, the individual fibers look different, whereas also SYNTHETIC FIBRE look the same. This provides an easy way to differentiate between natural and synthetic fibers under a microscope.

SILK
Silk is a 'natural' protien fibre, some forms of which can be wovens into textiles. The best-known type of silk is obtained from cocoons made by the larve of the silkworm bombyx bori reared in captivity. Rearing of silks is called secriculture. Degummed fibers from B. mori are 5-10 μm in diameter. The shimmering appearance for which silk is prized comes from the fibers' triangular prism-like cross-sectional structure which allows silk cloth to refract incoming light at different angles.

The length of the silk fiber depends on how it has been prepared. Since the cocoon is made of one strand, if the cocoon is unwound carefully the fibers can be very long.

Spider silk is the strongest natural fiber known. The strongest dragline silk is five times stronger than steel and three times tougher than kelvar. It is also highly elastic, the silk of the ogre-faced spider can be stretched six times its original length without damage. As of 2005, there is no synthetic material in production that can match spider silk, but it is actively being sought by the U.S. military for such applications as body armour, parachutes and rope. Genetically engineered goats have been raised to produce spider silk in their milk at a cost of around $1,500 per gram.

WOOL
Wool is a natural fibre which is take from animals.

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BOTH THE FIBRE ARE NATURAL FIBRE

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Because they obtained from animals

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Wool and silk are natural fibre because it doesn't prepare by human, it comes from nature.

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The correct answer is option d) Natural fibre

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Natural fibre because wool we get from sheep and silk we get from silkworm.and they both are livingthing

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Wool and Silk are - Natural fibre

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D)natural fibre

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Natural  fibres

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Natural fibres
silk and wool are it came from sheep silk warm

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Natural fibre because they obtained by sheep's and silkworm

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Fibres which are obtained from plants and animals are called natural fibres . Silk is obtained from silkworms and wool is obtained from animals (sheep , goat etc.). So, silk and wool are natural fibres.

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Wool and silk are natural fibers

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Because they are natural

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The right answer is - Natural fibres beacuse wool and silk are produced by naturally

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They r natural fibres because they r obtained naturally wool from sheep...and silk from silk worm

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Natural fibers

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Wool and Silk are made from animals so they are natural fibers .Wool is given by sheep/ goat and  Silk is given by the cocoons of the Silkworm.

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Wool and silk are natural fibre because silk is obtained from silkworms and wool is obtained from sheep so the wool and silk are natural fibre

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Natural fibres because these fibers grow on plant

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Wool and silk are made from sheep and silkworm respectively.
natural fibres are those fibres that is received from animals or plants.
So we get it from animals hence answer is (D)

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THEY ARE NATURAL FIBERS

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Because it is a animal fiber and plants and animals fibers are called natural fibres

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Natural fibers are the fibers which we get by the nature and as we get wool from sheep and silk from silk worms they are called natural fibers..

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Animal Fibre -Wool and silk.Wool. wool comes from sheep, goat, yak and some other animals.These wool-yielding animals.....

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Wool and Silk are natural fibres because Wool is obtained from sheep and Silk is obtained from cocoon and they both are natural organisms so the fabric obtained from them is also natural fibres.

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D because they are received from natural resources

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Natural fibres are fibers that are produced by plants, animals, and geological processes .They can be used as a component of composit materials, where the orientation of fibers impacts the properties. Natural fibers can also be matted into sheets to make paper or felt.

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Option Dis correct answer

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Natural fiber as natural fiber are obtained from plants or animals and wool is obtained from sheep etc. And silk from silkworms.

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Wool and Fiber are natural fibres because they are obtained from the plants or nature...

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Option D is correct

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Wool and Silk are Natural Fibre because Wool we get from sheep, camel, yak , Llama , Apaca etc. Silk e get from silk moths in right word coccon.

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Answer is natural fiber

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Wool and silk are natural fibres  because wool and silk are obtained  from  animals and animals are part of nature so,ultimately  wool and silk are considered as  natural fibres

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Wool and silk are natural fibre which is obtained by animals and plants..

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Natura fibre

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Natural fibre
because it comes from sheep and silkworm respectively

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Yes because they obtained from plants and animals and plants and animals are natural sources

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As wool and silk  are obtained from animals so they are animal fibers and as animal fibers are also natural fibers as they are obtained from nature so wool and silk are natural fibers.

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Plants : cotton, jute
amimal: silk,wool
plants and animals are both belong to nature thus,they made for thaem and we take that for making sweaters etc and they are natural but remember that we also make
cloth like polyester, nylon,acrylic this can't go in natural because made by us. From petroleum I hope you what is petroleum. While seperating from petroleum other things also be found from deep into ground. This things to company of making cloth and they make now you understand about all. But man made cloth is much better than natural but in some case naural made is very popular
then man made cloth .

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D

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D  natural fiber

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D is right answer they are natural fiber because wool is taken from sheepskin and silk is taken from silkworm so they are taken from nature not made by humans so they are Natural fiber

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Natural fibre because it in taken from the nature

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Natural fibers...as they are obtained from animal.

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Because natural fiber is obtained from plant and animal

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# As it is a Natural fibre

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Nf

Similar Class 7 Doubts

Classify the following fibre aa natural or synthetic :nylon;wool;cotton; silk ; polyester and jute?

Coir and jute are 1.synthetic fibre 2.natural fibre 3.organic fibre 4.mixed fibre?

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If natural fibers are obtained from nature ,what are artificial fibres made of?

man made fibre are called synthetic fibres Related: NCERT Solutions - Fibre to Fabric?

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