Question

how do metamorphic rocks form? heat and pressure will only chemically change a parent rock that is sedimentary or igneous to form a metamorphic rock. heat and pressure chemically changes a parent rock to sediment again. heat and pressure chemically changes a parent rock of any type in the rock cycle (igneous, sedimentary, or metamorphic) to form a metamorphic rock. heat and pressure chemically changes a parent rock to molten magma again.

Explanation:

Metamorphic rocks form when any type of parent rock (igneous, sedimentary, or metamorphic) undergoes chemical changes due to heat and pressure.

Answer:

Heat and pressure chemically changes a parent rock of any type in the rock - cycle (igneous, sedimentary, or metamorphic) to form a metamorphic rock.