Question

Assertion (A): Eutrophication shows sudden increase in the growth of green plants or productivity in water.

Reason (R): With increasing eutrophication, there is depletion of dissolved oxygen in water which leads to death of most fish and aquatic life.

Options

• Both assertion (A) and reason (R) are true, and reason is the correct explanation of assertion.

• Both assertion (A) and reason (R) are true, but reason is not the correct explanation of assertion.

• Assertion (A) is true but reason (R) is false.

• Both assertion (A) and reason (R) are false.

Answer 1

Both assertion (A) and reason (R) are true, and reason is the correct explanation of assertion.

Explanation:

Nutrient enrichment causes a rapid increase in algal and other green plant growth. The resulting decomposition and oxygen depletion can kill fish and other aquatic life.