Primary sector: Goods which are produced by exploiting natural resources come under the category of primary sector. This sector is also called as agriculture and related sector, e.g. - cotton.

Secondary sector: Transformation of one good into another comes under the category of secondary sector. Manufacturing is one of the important components of this sector.
Example: Transformation of sugarcane into sugar.

Tertiary sector: All production units producing services which help in the development of primary and secondary sectors come under the category of tertiary sector. This is also known as service sector.
Example– Services given by doctors, teachers, lawyers etc.....

Primary Sector:
The primary sector refers to the sector of the economy that involves the extraction and production of natural resources. It includes activities such as farming, fishing, mining, forestry, and animal husbandry. This sector is considered the backbone of an economy as it provides the necessary raw materials for other sectors to operate.

Examples:
1. Agriculture: Cultivating crops, raising livestock, and growing fruits and vegetables are part of the primary sector. Farmers engage in activities like plowing fields, sowing seeds, irrigation, and harvesting to produce food and raw materials.

2. Fishing: The primary sector also includes fishing activities, such as catching fish, shellfish, and other aquatic animals. Fishermen use various techniques like nets, lines, and traps to catch fish for consumption and commercial purposes.

3. Mining: Extracting minerals and other valuable resources from the earth is another primary sector activity. This includes mining coal, iron ore, gold, diamonds, and other metals or minerals. Miners use methods like drilling, blasting, and excavation to obtain these resources.

4. Forestry: Forestry involves the management, cultivation, and conservation of forests and their resources. This includes activities like logging, timber production, and forest conservation. Foresters play a crucial role in maintaining the balance between resource extraction and environmental preservation.

Secondary Sector:
The secondary sector involves the processing and manufacturing of raw materials obtained from the primary sector. It includes activities such as construction, manufacturing, and processing of goods. This sector adds value to the raw materials by transforming them into finished products.

Examples:
1. Manufacturing: Industries that produce goods on a large scale are part of the secondary sector. This includes the manufacturing of automobiles, electronics, textiles, machinery, and other consumer goods. Workers in these industries use machinery, assembly lines, and various processes to convert raw materials into finished products.

2. Construction: The construction sector involves the building of infrastructure, such as houses, roads, bridges, and commercial buildings. Construction workers use materials like cement, steel, and wood to construct and develop these structures.

3. Textile Industry: The textile industry is a significant part of the secondary sector. It involves the production of fabrics, clothing, and other textile products. Processes like spinning, weaving, dyeing, and stitching are carried out in textile mills and factories.

Tertiary Sector:
The tertiary sector is the service sector of the economy and involves providing services to individuals and businesses. It includes activities such as transportation, banking, education, healthcare, tourism, and hospitality.

Examples:
1. Healthcare: Hospitals, clinics, and healthcare professionals provide medical services to individuals. This includes doctors, nurses, diagnostic services, surgeries, and medication.

2. Education: Schools, colleges, and universities provide education and knowledge-based services. Teachers and professors impart knowledge to students, ensuring their educational development.

3. Tourism: The tourism industry includes services related to travel, accommodation, and entertainment. This involves hotels, tour operators, travel agencies, and tourist attractions that cater to the needs of travelers.

4. Banking: Banks and financial institutions provide various financial services to individuals and businesses. This includes services like deposits, loans, investments, and electronic banking.

In conclusion, the primary sector involves the extraction of raw materials, the secondary sector involves processing and manufacturing, and the tertiary sector provides services. These sectors are interdependent and contribute to