Concept: Aestivation is a state of dormancy triggered by hot or dry conditions.Explanation: Some animals become inactive during prolonged heat or drought to conserve water and energy.This survival strategy is known as aestivation.It differs from hibernation, which occurs during cold winter months.It is not a migration, which involves moving to another location.It is also not merely adaptation, which is a broader term for survival features.Answer: B. Aestivation