Question

Given below are two statements: Assertion (A): Water erosion is due to the dispersive action and transporting power of water as it descends in rain and leaves the land in the form of run-off. Reason (R): Water erosion is caused by people who remove protective plant covers by tillage operation, burning crop residues, over grazing, over cutting forests, etc.

• A. Both A and R are correct and R is the correct explanation of A
• B. Both A and R are correct but R is not the correct explanation of A
• C. A is correct but R is not correct
• D. A is not correct but R is correct

Hint:

Vegetative cover protects soil from raindrop impact and runoff erosion.

Answer 1

The Correct Option is B

Concept:
Water erosion occurs when rainfall and runoff detach and transport soil particles.

Step 1: Check Assertion.
The assertion says that water erosion occurs due to the dispersive and transporting power of water. Rain drops detach soil particles and runoff carries them away. \[ A \text{ is correct} \]

Step 2: Check Reason.
The reason says that human activities like burning crop residues, overgrazing, overcutting forests and improper tillage remove protective cover. This increases water erosion. \[ R \text{ is also correct} \]

Step 3: Check explanation.
Reason gives a cause that increases erosion, but it does not directly explain the physical mechanism of dispersive and transporting power of water. \[ R \text{ is not the correct explanation of } A \] \[ \therefore \text{Correct Answer is (B)} \]