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.

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Colder water → more O$_2$ → supports aquatic life.
Updated On: Feb 24, 2026
  • Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
  • Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
  • Assertion (A) is true, but Reason (R) is false.
  • Assertion (A) is false, but Reason (R) is true.
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The Correct Option is A

Solution and Explanation

Colder water holds more dissolved oxygen due to higher gas solubility at lower temperature.
So, fish and aquatic animals thrive better in cold water. Reason directly explains the assertion.
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