Question

Assertion (A): Aquatic species are more comfortable in cold water than in warm water.
Reason (R): Solubility of oxygen gas in water decreases with increase in temperature.

• A. Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
• B. Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
• C. Assertion (A) is true, but Reason (R) is false.
• D. Assertion (A) is false, but Reason (R) is true.

Hint:

Colder water → more O$_2$ → supports aquatic life.

Answer 1

The Correct Option is A

The assertion that fish and aquatic animals thrive better in cold water is directly explained by the fact that colder water holds more dissolved oxygen, a consequence of higher gas solubility at lower temperatures.