Question

select the correct answer. what is the primary way that metamorphic rocks form? a. lava erupts from earth and cools. b. water, wind, and gravity move particles from one place to another. c. rock fragments break apart and collect as sediment. d. existing rocks join together under high heat and pressure.

Explanation:

Metamorphic rocks form when existing rocks are subjected to high heat and pressure, which causes physical and chemical changes. Option A describes the formation of igneous rocks (lava cooling), option B describes erosion and sediment - transport processes related to sedimentary rocks, and option C describes the formation of sedimentary rocks from rock fragments. Option D correctly describes the formation process of metamorphic rocks.

Answer:

D. Existing rocks join together under high heat and pressure.