What stages are involved in complete metamorphosis of an insect?

The correct answer, which identifies the stages of complete metamorphosis in insects, includes egg, larva, pupa, and adult. This process encompasses four distinct life stages.

1. The egg stage is where the life cycle begins, as the female insect lays eggs that will eventually hatch into larvae.

2. The larva stage follows, where the insect primarily focuses on growth and feeding. This stage may resemble a worm or caterpillar, depending on the species, and is characterized by significant changes in size and form.

3. The pupa stage is a transformative phase, during which the larva undergoes substantial physical changes. Inside the pupal casing, the insect reorganizes its body structure to prepare for its final form.

4. The adult stage emerges after the pupa, signifying the completion of the metamorphosis. At this point, the insect has fully developed reproductive and adult characteristics, ready to mate and continue the life cycle.

This complete metamorphosis is crucial as it allows for specialization of life stages, with larvae focused on growth and adults focusing on reproduction, ultimately ensuring the survival of the species.