Question

What can excessive sand quarring lead to?

• A. Change in a river's course
• B. Decrease in number of trees nearby
• C. Decrease in silt quality
• D. Harm to aquatic life

Answer 1

Answer: (A), (C), (D)

The correct options are
A Change in a river's course
C Decrease in silt quality
D Harm to aquatic life

Excessive sand mining can alter the river bed, force the river to change course, erode banks, and lead to flooding. It also destroys the habitat of aquatic animals and micro-organisms besides affecting groundwater recharge.