Suckling is a born behavior essential for baby mammals. Suckling helps accomplish basic life function. It's to give milk to from the breast or udder. Suckling ensures survival, since baby mammals can't feed on their own. Mother animals have to feed their young in order to make them grow and survive.

Migration is moving locations during seasonal changes. Animals do this behavior to look for food. Animals also move in order to reproduce. Migration ensures survival because its helps reproduce and keep population stable.