How does metamorphosis happen?

Metamorphosis is a biological process in which an organism undergoes significant physical changes from one developmental stage to another, commonly seen in insects and amphibians. In insects, such as butterflies, the process involves stages: egg, larva (caterpillar), pupa (chrysalis), and adult. During the pupal stage, the larva undergoes extensive reorganization of its body tissues and structures. In amphibians like frogs, metamorphosis involves transitioning from a tadpole with gills and a tail to an adult with lungs and limbs.