What is the term for the resting stage between larvae and adults in insects that undergo complete metamorphosis?

The resting stage between larvae and adults in insects that undergo complete metamorphosis is called the pupae. During this stage, the insect undergoes significant transformation, where the larval body is reorganized into the adult form. This process occurs inside a protective casing, which can vary in form depending on the species.

Insects such as butterflies, beetles, and flies are known to enter this pupal stage, where they do not feed and remain inactive as they undergo the physical changes necessary to emerge as adults. This phase is crucial for development, allowing the insect to emerge fully formed with distinct adult characteristics, such as wings and reproductive organs.

The other terms mentioned refer to different life stages. The egg is the initial stage where the insect develops, nymphs are the immature stages of insects that undergo incomplete metamorphosis and do not enter a pupal stage, while adults are the final stage of development after the pupal stage is completed. Thus, pupae correctly identifies the transitional life stage between the larval and adult forms in insects with complete metamorphosis.