The diagram illustrates the stages involved in the life cycle of a frog.
Initially, mating occurs between male and female frogs on land, after which the female lays eggs, known as frogspawn, on the surface of the water. Following a period of 7 to 10 days, tadpoles hatch from these fertilized eggs. Subsequently, these tadpoles undergo three distinct growth stages. During the first stage, their primary food source consists of algae.
In the ensuing phases, the tadpoles spend approximately 6 weeks maturing before entering the second stage, where their bodies grow significantly longer. Over the next 9 weeks, they progress to the third stage of development. Afterward, a further 12 weeks are required for the tadpole to transform into a froglet, at which point it begins pulmonary breathing. Eventually, the young frog leaves the water to live on land. After four years, it reaches adulthood and is capable of beginning the reproductive cycle again.
Overall, it is evident that the process is comprised of eight distinct stages, commencing with the mating of mature frogs and culminating in the development of a new adult. The process is entirely cyclical in nature.