A nymph is the young stage of the:

Correct answer: (c) Cockroach

Explanation

A nymph is the young stage of an insect with incomplete metamorphosis (egg → nymph → adult). It looks like a small adult without fully developed wings or reproductive organs and becomes an adult through several moults. The cockroach, grasshopper, termite and bug grow this way.

The housefly, butterfly and beetle have complete metamorphosis (egg → larva → pupa → adult); their young stages are larvae (maggot, caterpillar, grub).