Which of the following best describes complete metamorphosis?

Complete metamorphosis is a developmental process observed in certain insect species that encompasses four distinct stages: egg, larva, pupa, and adult. This process is characterized by a significant transformation during the pupal stage, where the organism undergoes profound changes, ultimately leading to a fully developed adult form that often looks entirely different from its larval stage. The unique pupa stage plays a crucial role in reorganization and development, allowing for the transition to the adult insect.

This comprehensive transformation facilitates the specialization of different life stages for various functions, enabling better survival and resource allocation. For instance, larvae often focus on feeding and growth, while adults may be adapted for reproduction and dispersal. The presence of a pupal stage and its unique characteristics are key features distinguishing complete metamorphosis from other developmental types, such as gradual or incomplete metamorphosis, which do not involve a pupal stage.