Question

which phrases apply to metamorphic rocks? check all that apply. form under extreme heat and pressure form from existing rocks form from magma and lava form when sediments combine form from volcanic eruptions

Explanation:

Metamorphic rocks are formed from existing rocks (protoliths) that undergo metamorphism due to extreme heat and pressure. Magma and lava form igneous rocks. Sediments combining form sedimentary rocks. Volcanic eruptions are related to igneous rock formation (from lava).

Answer:

form under extreme heat and pressure, form from existing rocks