Which phrases describe how metamorphic rocks form? check all that apply. form from melting form at earth’s surface form from sediments form from existing rocks form from exposure to heat and pressure

Metamorphic rocks form from exposure to heat and pressure and from existing rocks

Option (3) and (4)

Explanation:

The metamorphic rocks are usually defined as those rocks that are formed from the previously existing igneous or sedimentary or other metamorphic rocks. These are formed when the rocks are subjected to high pressure and temperature conditions. They are also known as the secondary rocks. The main factor here is both temperature as well as pressure. For example, Quartzite, Marble, Schist, and Gneiss.

Thus, the correct answer is option (3) and (4).

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