Why did many early farmers settle in river valleys?

Because River valleys are most fertile region and the first human settlement were all done to do agriculture. The fertile soil in these regions were best suited for agriculture. Hence people first settled near river valleys. Most civilizations began near rivers and lakes. The people needed the water for drinking and growing plants, a skill learned during the Neolithic Revolution. River Valleys became ideal locations for cities and settlements because of the fertile land surrounding the river beds.

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answer; /// i believe that the correct answer is (d)the huang he river valley;

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