Multiple choice general knowledge

A rift valley is formed mainly due to

  1. The forces of tension in the earth?s crust

  2. The subsidence of the floor of a river valley

  3. The valley formed after the formation of fold mountains

  4. The deepening of a valley by ice action
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A Correct answer
Explanation

Rift valleys form when tectonic plates move apart due to tension forces, causing the crust to thin and drop down between parallel fault lines. This creates elongated valleys like the East African Rift System. Options B, C, and D describe other geomorphic processes unrelated to rifting.

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