What aspect of insect life is involved in metamorphosis?

Metamorphosis refers to a significant transformation that insects undergo during their life cycle, which is characterized by distinct stages—such as egg, larva, pupa, and adult. This process is fundamentally tied to growth and development, as it involves a complete change in form and function. For example, during the larval stage, an insect may focus on feeding and growing, while during the pupal stage, it undergoes a complete reorganization of its body structure, which eventually leads to the emergence of the adult form. This transformational growth and development are essential for the insect to adapt to different ecological niches and fulfill different roles within its life cycle, making it a critical aspect of metamorphosis.

The other options focus on different aspects of insect biology: feeding habits relate to how insects acquire nutrients, breeding practices involve reproduction, and environmental adaptation concerns how insects adjust to their habitats, all of which are certainly important but are not the core aspect intrinsically linked to metamorphosis itself.