What Is the Difference Between Estivation and Hibernation

Multiple Choice

What is the difference between estivation and hibernation?

A) Hibernation occurs during the winter, whereas estivation occurs during the summer.
B) Hibernation refers to mammal torpor, whereas estivation refers to invertebrate torpor.
C) Estivation is a less extreme form of hibernation.
D) Estivation is a more extreme form of hibernation.
E) There is no difference; "hibernation" and "estivation" are synonyms.