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Question

How does biological weathering occur?

A
Reaction of minerals and moisture of rocks
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B
Stress caused due to crystallisation of salts on rock surface
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C
Erosion of rock surface by wind and water
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D
Widening of cracks by roots of plants and burrowing by animals
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Solution

The correct option is D Widening of cracks by roots of plants and burrowing by animals
The broken fragments of rocks form soil which is needed for plants to grow. Biological weathering occurs when sometimes, tiny plants may sprout up in and around broken rocks, and these sprouts turn into bigger plants. As they grow bigger, their roots start penetrating the rock, particularly in weak spots or joints, and eventually the rock splits.

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