Answer:

The small fluffy fibers of wool are formed as burrs.

Explanation:

Wool is the natural fiber obtained from the fleece of sheep or other animals like goats, llamas, and rabbits. It is commonly used to make warm clothing, blankets, and other textile products. The process of obtaining wool involves several steps, including shearing, sorting, cleaning, and spinning.

When sheep graze in fields or pastures, they often come into contact with plants that have burrs. Burrs are small, prickly seed capsules that are covered in tiny hooks. These hooks easily attach to the fibers of the sheep's fleece as they brush against the plants.

Formation of Small Fluffy Fibers:
When the sheep's fleece is sheared, the burrs remain attached to the wool. During the subsequent steps of sorting and cleaning, the burrs are removed from the fleece. However, while removing the burrs, the fibers around them get tangled and form small fluffy clusters. These clusters are the small fluffy fibers of wool that are formed due to the presence of burrs.

Importance of Removing Burrs:
It is essential to remove the burrs from the wool because they can cause discomfort to the wearer and affect the quality of the final product. The presence of burrs can make the wool itchy and uncomfortable to wear. Additionally, burrs can also damage the spinning equipment and affect the quality of the spun yarn.

Conclusion:
In conclusion, the small fluffy fibers of wool are formed as burrs. These burrs attach to the sheep's fleece when they come into contact with plants in the fields or pastures. While removing the burrs during the sorting and cleaning process, the fibers around them get tangled and form small fluffy clusters. It is important to remove the burrs to ensure the comfort and quality of the wool.