How are complete metomorphisis and incomplete metomorphisis different?

Complete metamorphosis involves four distinct life stages: egg, larva, pupa, and adult, as seen in insects like butterflies and beetles. In contrast, incomplete metamorphosis consists of three stages: egg, nymph, and adult, where the nymph gradually resembles the adult form without a pupal stage, as seen in grasshoppers and cockroaches. This key difference in the developmental process leads to varying physical changes and life cycle complexities between the two types of metamorphosis.