Question

Assertion (A): Residual mountains are also called mountains of denudation.

Reason (R): Denudation and erosion by natural agents cause mountains to be lowered.

Options

• Both A and R are true and R is the correct explanation of A.

• Both A and R are true but R does not explain A.

• A is true but R is false.

• A is false but R is true.

Answer 1

Both A and R are true and R is the correct explanation of A.

Explanation:

• Assertion (A) is true because residual mountains are indeed called mountains of denudation. These mountains are the remnants of older, once higher mountains that have been eroded over time by natural agents like wind, water, and ice, leaving behind the more resistant rock masses.
• Reason (R) is also true because denudation refers to the process of wearing down the Earth's surface through erosion, and this leads to the lowering of mountains. Over time, natural forces break down and wear away the peaks of mountains, leaving behind residual mountains.

Thus, both A and R are correct, and R effectively explains why residual mountains are called mountains of denudation.