It means the reaction of an organism when something happens to it. Look over there. There was a prairie dog getting killed by two bears. It means any thing that causes an organism to respond. But that looks like a piece of the ground, which is called mimicry.
Mimicry means an adaptation that makes an animal look like another animal or object.
Mimicry is most often used in defense. It's geese migrating south. It means the seasonal movement of animals from one place to another. It means a state, similar to sleep, in which some animals pass the winter. Well class it's time to leave.