The answer to the question is molten rock-cools and hardens -> igneous rock – weathered, eroded and deposition -> sedimentary rocks – stress or heat -> metaphoric rock – heat and melted -> molten rock. The rock cycle is the process of how rocks forms, breaks down and reforms again as a result of igneous, sedimentary and metamorphic process. To make the answer understandable, here is how rocks are formed: A molten rock or magma cools down and crystalizes to form igneous rocks. Through weather, erosion and deposition, igneous rocks become sediments. When sediments then undergo the process of lithification, it becomes sedimentary rocks. When exposed to heat and pressure, sedimentary rocks become metamorphic rocks which melt to become a molten rock again.
Some additional information: Igneous rocks are formed when magma cools down and solidifies – intrusive igneous rock and extrusive igneous rocks are two kinds of igneous rocks. Sedimentary rocks are formed by sediment deposits which solidify over time either on the surface of the Earth or within bodies of water. Metamorphic rocks are formed when igneous or sedimentary rocks get subjected to heat and pressure with intrusive or extrusive igneous rocks.
Molten rock-cools and hardens->igneous rock - weathered,eroded,&deposition->sedimentary rock- stress or heat-> metaporhic rock-heat & mealted-> molten rock
