What changes have been brought in the secrors(primary,secondary&tertiary) over a period of time?
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All these sectors have progressed a lot over a period of time. The sectors have developed transport system, connectivity among each other. This progress is going on constantly and will surely change the future world.
manvirsinghchana:
Plzzz eleborate more
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people were depending more on primary sector. 3) People started demanding more and more goods. 4) this demand leds to tertiary sector. all develop countries have develop tertiary sector in their country.
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