The diagram shows the reproduction process of frogs.
Overall, there are various stages in the life of a common frog, from mature frogs mating to produce frog spawn, to the growth of the immature form, known as tadpoles, to mature frogs developing some time later.
At the beginning of the process, the mating of two adult frogs takes place on the bank of a river or pond, after which frogspawn or eggs are laid in the water by the female. This is followed by the frogspawn developing into tiny tadpoles, at which point they gradually develop their limbs, and organs and change their body shape while living in the water.
The process continues with the tadpoles growing into young frogs, which still display the tail section. However, the tail is shorter than that of a tadpole. These young frogs, continue to inhabit in the water before they develop into mature ones and are able to live outside the water. It is important to note that they lose their tails at this stage. Finally, the cycle begins again when two fully-grown frogs, which a capable of reproducing, mate.