When an animal sleeps through cold weather, that is called _____.
radial
appendage
hibernation
estivation
visceral
hibernation
When an animal sleeps through hot weather it is called _____.
estivation
visceral
appendage
hibernation
radial
estivation
When an animal sleeps through cold weather, that is called hibernation.
To find the answer, one could start by thinking about the behaviors that animals exhibit in response to cold weather. One may recall that certain animals tend to go into a prolonged period of sleep or inactivity during the winter months when environmental conditions are harsh. This behavior allows them to conserve energy and survive when food and resources are scarce.
Having this information, one could try to eliminate the options that don't match this behavior. For example, "radial" and "appendage" are not related to sleep or cold weather. "Visceral" is a term related to internal organs and doesn't describe the sleep behavior in question.
This leaves us with two possible options: hibernation and estivation. However, estivation primarily refers to a period of inactivity during hot or dry weather, rather than the cold weather mentioned in the question. Therefore, the correct answer is hibernation.