Winter sleep is called as (A) Aestivation (B) Hibernation (C) Migration (D) Adaptation

Winter sleep is called as

Correct answer: (B) Hibernation

Explanation: Hibernation is a state of inactivity and metabolic depression in animals during the winter. Animals enter this dormant state to conserve energy when food resources are scarce and temperatures are low. In hibernation, the animal’s body temperature, heart rate, and breathing rate decrease significantly to minimize energy expenditure. Common examples of animals that hibernate include bears, bats, and hedgehogs.

Aestivation (Option A) is a similar state of dormancy, but it occurs during hot and dry periods, helping animals survive extreme summer conditions.
Migration (Option C) is the movement of animals from one region to another, often seasonally, to find food or better living conditions.
Adaptation (Option D) refers to any trait that improves an organism's ability to survive and reproduce in its environment, not a specific seasonal behavior like winter sleep.
Therefore, the correct answer is (B) Hibernation.