what are the reason for the development of most of the old human civilization on the banks of river?

The main reason is the fertile soil that allowed them to be engaged in different labors connected with agriculture. These rivers were therefore the cradle of civilization.

Explanation:

First civilization appeared in the river valleys of Indus, Nile, Tigris, Euphrates and other rivers, because those river created fertile soil on the river banks. People settled in the nearby of those rivers, and created a region famous as fertile crescent. Development of certain technologies led to development of agriculture and permanent settlements.

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i believe

clean air is essential for health and survival

clean air provides nitrogen gas for plant respiration

clean air supplies oxygen that enables living organisms to breathe

hope this

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