What are the stages of insects that undergo complete metamorphosis?

The stages of insects that undergo complete metamorphosis include egg, larva, pupa, and adult. This life cycle is characterized by four distinct phases, each with specific developmental changes.

Starting with the egg stage, insects hatch from eggs, leading to the larval stage. The larva often looks completely different from the adult form and typically focuses on feeding and growth. After the larval stage, the insect enters the pupa stage, where it undergoes significant transformation; this stage is often referred to as the resting stage, as the insect does not feed and undergoes numerous changes internally and externally. Finally, the adult stage emerges from the pupa, showcasing the fully formed physical characteristics and reproductive capabilities of the insect.

This process allows for various adaptations and ecological roles at different life stages, which is a crucial aspect of the survival and evolution of many insect species. Other options mention stages that are either incomplete or miss crucial stages, underscoring the significance of the full cycle represented in the correct answer.