why are the river valleys thickly populated many reasons
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Water is a very essential to live ,river valley are thickly populated because (1)people need water to wash clothes, water for cooking, drinking and for bath.
(2) people who lived there they used for agricultural and irrigation also.
(3)they used water for animals's bath
(2) people who lived there they used for agricultural and irrigation also.
(3)they used water for animals's bath
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