The life cycle of a frog consists of three stages: egg, larva, and adult. As the frog grows, it move through these stages in a process known as metamorphosis. Frogs are not the only animals to unde metamorphosis; most other amphibians also undergo remarkable changes throughout their life cye as do many species of invertebrates. During metamorphosis, two hormones, prolactin and thyroxin control the transformation from egg to larva to adult. 2. The type of the text is explanation