Final answer:
The stages in incomplete metamorphosis are Egg, Nymph, and Adult, with young insects resembling the adults and gradually developing features like wings over successive molts.
Step-by-step explanation:
The stages in incomplete metamorphosis are: 1) Egg, 2) Nymph, and 3) Adult. Animals like grasshoppers undergo this process where the young resemble wingless adults. During successive molts, nymphs develop larger wing buds until the final molt, when they emerge with functional wings and reproductive organs. Unlike complete metamorphosis, where stages like larva, pupa, and adult are distinctly different, incomplete metamorphosis involves a more gradual transition without a pupal stage. As for the options provided, amphibians such as frogs go through a different process that includes stages like tadpole and froglet, which is not the same as insect metamorphosis.