All activities that are associated with the use of natural resources like agriculture, fishing, forestry etc. are included in the primary sector. The primary sector of the economy involves the conversion of natural resources into primary products. There are many activities that are undertaken by directly using natural resources. Take, for example, the cultivation of cotton. It takes place within a crop season. For the growth of the cotton plant, most of the natural products we get are from agriculture, dairy, fishing, forestry, this sector is also called agriculture and related sector.