Question

classification of industries on the basis of ecionomic activities

Answer 1

raw materials (primary sector)
manufacturing industry (secondary sector)
service sector (tertiary sector)
knowledge sector (quaternary sector)

Answer 2

industries are classified in four types kk
1) on the basis of types raw materials
2) on the basis of ownership
3) on the basis of labour
4) on the basis of source of raw materials kk
hope it could help