The given illustration shows details about the series of events through which a frog gives birth to a new generation which become an adult frog.
In an overview, An adult frog is shown which undergoes seven steps that are: Eggs production, egg conversion into embryo, tadpole development, initiation of pulmonary breathing, the maturation process in which a baby frog is formed and lastly an adult frog. The given diagram is a cyclic one.
To commence with detail, the cycle initiates with the mature adult frog. First stage in when an adult frog goes into water and lay eggs. The layed eggs with the passage of time grows into embryos. As the embryo grows, a tadpole is formed which grows tail and anterior legs. In the next phase, Tadpole generates posterior legs also and this is the stage where pulmonary breathing gets initiated. All of the above mentioned phases occur inside water.
In addition to this, the tadpole then comes out of the water and spend the rest of their developmental phases on earth. During this phase, the tail of tadpole gets short while the body matures into more frog like appearance. Final stage of the given lifecycle begins when a small frog matures into an adult frog with the passage of time.