Question

Assertion (A): The thickness of the lithosphere is very fragile compared to the nature and composition of the earth.

Reason (R): There are continuous changes in the earth's crust due to forces of nature.

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 the lithosphere, which is the Earth's outermost layer, is relatively thin and fragile compared to the deeper layers like the mantle and core. It is not as dense or as strong as the layers below it.
• Reason (R) is also true. The earth's crust is constantly undergoing changes due to various forces of nature such as tectonic movements, earthquakes, volcanic activity, and erosion. These forces can cause continuous changes in the structure and composition of the lithosphere, making it "fragile" compared to the other layers.