Question

A crib is to a baby what a nest is to : a chick.a squirrel.a marten.a bat

Answer 1

a nest is to a chick

Answer 2

A crib is to a baby what a nest is to a Squirrel.  

This is because squirrels build extensive nests for their young ones. Chickens do not practice the building of nests and neither does bats. Bats rather hang upside down with their little ones on them.  

Martens sometimes choose to build nests or marten boxes as they are called in the hollow of tree trunks or even abandoned nests of other animals.