Economic activities: All such activities which give us some income is called economic activities. Pulling cycle-rickshaw, cleaning houses, selling vegetables and working in schools, factories, banks etc. are economic activities.
Activities undertaken in Primary, Secondary and Tertiary sectors :
(i) Primary Sector: Activities concerned with collecting or making available material provided by nature are included in primary sector like agriculture, poultry farming, mining, fishing etc.
(ii) Secondary Sector: The activities which are associated with transforming raw material or primary products into commodities useful to man such as manufacturing etc.
(iii) Tertiary Sector: The activities which are essential for running modern factories in a big way are termed as tertiary sector. Activities like trading, banking, health, education, insurance etc. are included in tertiary sector.