Question

What causes metamorphic rocks to form from existing rocks? Answer b heat and pressure

Answer 1

heat and pressure.

Step-by-step explanation:

high heat, high pressure, hot mineral-rich fluids or, more commonly, some combination of these factors.

Answer 2

Metamorphic rocks form when rocks are subjected to high heat, high pressure, hot mineral-rich fluids or, more commonly, some combination of these factors. Conditions like these are found deep within the Earth or where tectonic plates meet.