The caterpillar, which is the larval stage of a butterfly, is very different from its adult form. which phenomenon is responsible for this difference?

Metamorphosis i believe

Answer;

Metamorphosis

Explanation;Metamorphosis refers to the process in which an animal changes its from or structure after hatching or birth. It involves a striking and relative abrupt change in an animal's body structure through cell growth and differentiation.The physical changes are regulated by molting and juvenile hormones.  In insects it occurs in stages; egg stage then Larva stage called Lymph and then to an adult stage.