Why are the river valleys thickly populated?

River valleys are thickly populated because people need water to wash clothes,water for drinking,water for taking bath,water for cooking food.

especially river valleys are populated by villager because there is no much fecilities

of water in villages till now.

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• Availability of water for agriculture
• Availability of water for industry
• Availability of fresh water to support dense population.
• Access to the river as transportation artery to the interior as market, and to the outside world for export/import economy.