The given diagram illustrates the information about formation of rocks and their complete cycle.

The picture gives information about natural phenomena and the rock cycle. It can be seen from the progress there are three types of rocks namely igneous, sedimentary, and metamorphic which formed under various natural conditions such as erosion and deposition. Firstly, a volcano erupts and molten magma falls to the ground. Then the lava cools quickly and turns into igneous rock. At this point, the rock again rises slowly to a higher surface. Secondly, when it rains this rock then erodes into sand and stones resulting in a deposition under the sediments that gradually turn into tocks. Thirdly under high pressure and temperature, it converts into metamorphic rock. When the final stage has been completed, the metamorphic rock reaches a certain level of pressure and adds heat, it melts becoming magma. This magma rises to the surface through a volcano. Having completed all these steps, the lifecycle will then begin again.