Primary sector comprises activities related to the extraction and production of natural resources. Agriculture, forestry, animal husbandry, fishing, poultry farming, mining and quarrying are the activities undertaken in this sector.

Secondary sector comprises activities related to the processing of natural resources. Manufacturing is included in this sector.

Tertiary sector comprises activities that provide support to the primary and secondary sectors through various services. Trade, transport, communication, banking, education, health, tourism, insurance, etc., are examples of tertiary activities.