The correct option is C Primary
Primary sector: There are many activities that are undertaken by directly using natural resources. For example, the cultivation of cotton. Cotton production depends mainly (though not entirely) on natural factors like rainfall, sunshine and climate. So cotton is a natural product. Basic dairy products, minerals and ores are also natural products. When we produce a good by exploiting natural resources, it is an activity of primary sector. This is because it forms the base for all other products that we subsequently make. Since most of the natural products are from agriculture, dairy, fishing, forestry, this sector is also called agriculture and related sector.