What type of metamorphosis do insects undergo that has distinct life stages?

Insects that undergo complete metamorphosis experience four distinct life stages: egg, larva, pupa, and adult. This transformation allows for a significant change in form and function between stages. For example, larvae may be worm-like and primarily concerned with feeding, while adults often have wings and different dietary habits. Each stage has unique developmental characteristics and ecological roles, making complete metamorphosis a fascinating adaptation among insects.

In contrast, gradual and incomplete metamorphosis involve fewer distinct changes. Gradual metamorphosis has life stages that transition more smoothly and may not include a pupal stage, while incomplete metamorphosis typically features three stages: egg, nymph, and adult, with nymphs resembling smaller adult forms. Thus, the unique and distinct stages of development in complete metamorphosis set it apart from other forms of metamorphosis.