Which of the following insects would you expect to undergo complete metamorphosis?

Complete metamorphosis is a developmental process that involves four distinct life stages: egg, larva, pupa, and adult. This type of metamorphosis is characteristic of certain insect groups known as holometabolous insects. Among the options provided, beetles are an example of organisms that undergo complete metamorphosis.

In the life cycle of beetles, they start as eggs, which hatch into larvae (often referred to as grubs). These larvae then enter the pupal stage, where they undergo significant transformation before emerging as adult beetles. Each stage is markedly different from the others in both form and function.

In contrast, the other insects listed, such as grasshoppers, aphids, and true bugs, exhibit incomplete metamorphosis. This means they have three life stages: egg, nymph, and adult. The nymphs resemble smaller versions of the adults but don’t go through a pupal stage, which distinguishes their development from that of beetles. Thus, the unique life cycle of beetles demonstrates complete metamorphosis, making them the correct answer in this context.