Answer:
Insects who go through simple (or incomplete) metamorphosis have three life stages. These insects start as eggs, which are usually very small. When the egg hatches, a larva or nymph comes out. Nymphs are just baby insects. Metamorphic patterns are well-known in crabs, lobsters, and other crustaceans and also in snails, clams, and other mollusks. The larval form of the urochordate (e.g., the tunicate, or sea squirt) is tadpole-like and free swimming; the adult is sessile and somewhat degenerate.
Explanation:
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