Answer: rock melting—>crystallisation
Explanation: I am going to assume that the process must be a formal word like sedimentation, metamorphism, or crystallisation. The formal word for it is crystallisation. Metamorphic rocks are rocks that doesn’t melt even when exposed to extreme heat. This can be found under the Earth’s crust (so basically underground) near/under mountains. It is really hard to melt, but when they do melt (I’m not sure what the formal word is for this process, so I’m going to call it rock melting) the metamorphic rock turns into magma. This magma comes to the surface whenever the volcano erupts and is called lava. Whenever the lava dries up (crystallisation), it forms igneous rocks.
