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mam, explain about the historical change in sectors of our economy?

PRIMARY SECTOR
1. As the methods of farming changed farmers produce much more food then before.
2. Many people could take other activities also.
3. Number  of craftsmen and traders increased.
4. Buying and selling activities increased.
5. Besides this people are opting jobs of transporters, army and administrators etc.
SECONDARY SECTOR
1. Over a long time, new methods of manufacturing were introduced, factories came up and started expanding.
2. People who worked in farms, started working in factories.
3. Secondary sector gradually became the most important in total production and employment.
4. Importance of sectors had changed.

TERTIARY SECTORS
1. There has been a further shift from secondary to tertiary sector.
2. Service sector has become most important in terms of total production.
3. Most of the working people are also employed in the service sector.


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