(N/A) Hibernation and Aestivation are strategies used by organisms to survive unfavorable environmental conditions by entering a state of dormancy.
$1$. Hibernation (Winter Sleep): It is a state of metabolic depression in animals,characterized by low body temperature,slow breathing and heart rate,and low metabolic rate. It occurs during the winter season to escape extreme cold and food scarcity. Examples include bears,ground squirrels,and bats.
$2$. Aestivation (Summer Sleep): It is a state of animal dormancy,similar to hibernation but occurring during the summer season. It is a response to high temperatures and arid conditions (drought). It helps animals conserve water and energy. Examples include snails,earthworms,and some desert amphibians.