Primary Sector- It is connected with extraction and production of natural resources e.g., mining.
Tertiary Sector-It is concerned with providing support services to primary and secondary sector e.g., insurance.
Primary sector :-
These Sector are directly dependent on environment as these refer to utilisation of earth's resources such as land, water, minerals etc.
Example :- Fishing, forestry, agriculture, mining and quarrying.
Secondary sector (Manufacturing sector ):-
Secondary sector add value to natural resources by transforming raw material into valuable products.
Example :- Industry
Tertiary sector (Service sector) :-
Tertiary sector include both production and exchange.The production involves the provision of services that are consumed.
Example :- Banking,communication transportation, teaching, nursing etc.
Primary sector of an industry is known as the 'extractive' sector. These refer to the industries that produce raw materials. For example agriculture is classified in the primary sector. Farmers are primary sector workers producing raw materials like wheat, rice etc.
Secondary sector of an industry is known as the 'manufacturing sector'. The manufacturing industries use raw materials and produce products. For example, the steel can be used to manufacture cars and wood is used to manufacture furniture etc. Secondary sector is strongest in transitional economies.
Tertiary sector of an industry is known as the 'services sector'. This sector provides the final end product/ services. For example, banks, insurance, telecommunication, police etc. Usually the developed economies have a strong tertiary sector.