The given diagram illustrates the natural life cycle of a frog. Overall, this amphibian has 11 steps of development, from innating fertilized eggs to tadpoles to finally becoming a fully-grown frog.
In the beginning of the process, female frogs lay their eggs under water, which include the phase of evolving into embryos, eventually giving rise to tadpoles with a short tail that immediately cling to the water plant. These tadpoles undergo an extraordinary change from external gills for breathing to tails that keep on growing, enhancing their respiratory capabilities. These advancements include the appearance of hindlegs.
As the phases continue, the little frog survives by storing food in its tail, and the results can be seen as the front legs start to appear and the tail mostly vanishes. This amphibian undergoes a remarkably transitional color change from dark green to a vibrant hue, as the tail has disappeared completely. It is now fully supported by four limbs and eventually becomes a young frog; in the final step, it emerges as an adult frog. Ready to start the cycle once again.