How do metamorphic rocks form?

a-change due to heat and pressure

b-cooling of magma

c-weathering and erosion due to water

d-evaporation of seawater

A - change due to heat and pressure

Explanation:

There are three types of rocks around the world such as Igneous rocks, sedimentary rocks and metamorphic rocks.

Igneous rocks are formed from volcanic magma, it boozed out from the volcano to the earth surface then it becomes cool and solidified.

Sedimentary rocks are formed from igneous rocks, it formed from eroded material of igneous rocks over a period of time.

Metamorphic rocks are formed from igneous and sedimentary rocks, it formed due to heat and pressure over the millions of years.