Explore the primary, secondary, and tertiary sectors of the Indian economy, and understand their contributions to economic growth and development. A sector is one of a few general segments in the economy within which a large group of companies can be categorized. An economy can be broken down into about a dozen sectors, which can describe nearly all of the business activity in that economy. Sectors of Economic Activities Broadly, the four main sectors in an Economy are: Primary sector This sector deals with the extraction and harvesting of natural resources. These can be renewable resources, such as fish, wool and wind power. Or it can ... Economic activities are broadly grouped into primary, secondary, tertiary activities. Tertiary activities are again classified into quaternary and quinary activities. Indian economy is broadly classified into primary, secondary, and tertiary sectors , each playing a vital role in the nation’s economic development. The primary sector includes agriculture and allied activities, while the secondary sector covers manufacturing and industries.