analyzing why it is all the natural processes that change rocks in other types of rocks called a cycle?

i dont get what that means!

When magma pushes through the surface of the Earth (volcano) becomes lava when it finally cools in the rock of igneous rock called. Eventually the weather conditions, wind, rain, etc., break it into small pieces that are washed away and then accumulate in large piles (think beach), where changes in sedimentary rock. Finally this sedimentary rock is buried in the ground where he experiences both the pressure and finally hot, when you switch back and becomes metamorphic. This metamorphic rock can melt and eventually leave another Volano to start the process again. This is the cycle, igneous, sedimentary and metamorphic rocks.

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