Question

Assertion (A): Barchans are moon-shaped live dunes.

Reason (R): The migration of the barchans is a threat to desert life.

Options

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

• Both A and Rare 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:

Barchans are crescent-shaped dunes formed in deserts. Migration of barchans can bury vegetation, disrupt habitats, and damage human settlements, which makes it a threat to desert life.
So, both the assertion and the reason are true, and the reason correctly explains the assertion.