The life cycle of a frog has several stages, which are described below:

1. Egg: A female frog lays hundreds of tiny eggs in a pond or other damp environment. The eggs float on water in a jelly mass or cluster, and they will soon hatch into tadpoles.

2. Tadpole: Tadpoles hatch from the eggs with poorly developed gills, mouth, and tail. They feed on algae and grow rapidly. After 7-10 days, they start to swim around and become more active and social. By week 4, they are fully formed tadpoles.

3. Tadpole with legs: Between weeks 6-9, the tadpole will begin to form their legs. Their body continues to develop, forming a more distinct head. During this stage, tadpoles eat dead insects and plants. By week 9, they will look like a frog with a long tail.

4. Froglet: By week 12, the froglet will have only a stub for a tail. The froglet looks like a smaller version of a frog.

5. Frog: By week 12-16, the frog has grown to a fully developed frog. It is at this stage that they start to look for a mate and the cycle continues.

The life cycle of a frog is an example of metamorphosis, which is a process of changing from one form into another. Frogs are amphibians, which means that they can live in water or on land.