How did physical geography impact the migration and settlement of early human societies between 4000 and 1000 BCE?

Towns grew up along the rivers which had access to the sea. Rivers also provided protection from invaders. Farmers grew crops in the fertile fields that surrounded the towns. The lack of mountains was good for farming, but it made the towns easier to be invaded by enemies.

Explanation:

I've learned about it in history.

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i think it would be reparing roads  

d. promised it other land