Animals adapt, or change, to stay alive. This informative book shows how change can happen over time in an animal's body or in the way it behaves due to changing climates, habitat changes, and opportunistic behaviors that help animals survive, such as the creation of new... Animals adapt, or change, to stay alive. This informative book shows how change can happen over time in an animal's body or in the way it behaves due to changing climates, habitat changes, and opportunistic behaviors that help animals survive, such as the creation of new species.