sentences: a butterfly is a kind of insect & metamorphosis is when an insect changes from an immature form to an adult form ->  metamorphosis is when a butterfly changes from an immature form to an adult form  the immature form of a butterfly is called a caterpillar & the adult form of a caterpillar is called a butterfly ->  the adult form of a caterpillar is a butterfly and the immature form of a butterfly is a caterpillar  metamorphosis is when a butterfly changes from an immature form to an adult form & the adult form of a caterpillar is a butterfly and the immature form of a butterfly is a caterpillar -> metamorphosis is when a butterfly changes from caterpillar to a butterfly