Question

How does biological weathering occur?

• A. Erosion caused by wind on rock surface.
• B. Erosion caused by water on rock surface.
• C. Crystallisation formation on rocks filled with alkaline water.
• D. Enlargement of cracks within rocks by roots of plants and living animals.

Answer 1

The correct option is D Enlargement of cracks within rocks by roots of plants and living animals.

Sometimes, tiny plants may sprout up in and around broken rocks. These sprouts turn into bigger plants. As they grow bigger, their roots start penetrating into the rock, particularly in weak spots or joints. Eventually the rock splits.