The diagram below represents the rock cycle. the diagram shows 3 rectangular boxes labeled igneous rock, metamorphic rock, and sedimentary rock and 2 ovals labeled magma and sediment. there are 9 arrows. one arrow points from igneous rock to magma, one arrow points from igneous rock to metamorphic rock and is labeled a, one arrow points from igneous rock to sediment, one arrow points from magma to igneous rock, one arrow points from metamorphic rock to magma, one arrow points from metamorphic rock to sediment, one arrow points from sedimentary rock to metamorphic rock and is labeled a, one arrow points from sedimentary rock to sediment, and one rock points from sediment to sedimentary rock. which process is represented by the label a? a. compaction and cementation b. deposition and transportation c. heat and pressure d. weathering and erosion

C. Heat and Pressure

Explanation:

The arrow which is labeled A points from igneous rock to metamorphic rock.

There are three types of Rocks:

1. Igneous Rock

2. Metamorphic Rock

3. Sedimentary Rock

Rock cycle:

Rock cycle is the process that describes the transition between these three types of rocks. Each type has its own form and its own equilibrium condition. The rock type alters when it is pushed out of its equilibrium conditions.

Transition of Igneous rock to Metamorphic rock:

Igneous rock forms when magma cools down. The transition of Igneous Rock to Metamorphic Rock is a result of a process called Metamorphism. Metamorphism is the alteration in the structure of rock as a result of certain heat and pressure conditions. Inside Earth heat comes from pressure. Heat with pressure does not melt the rock but it bakes the rock. Baking is not melting but it changes the shape of the rock while it is still solid. It actually forms crystals. Because the rock changes its structure, it is called Metamorphic Rock.