Question

metamorphic rocks result from an old rock being subjected to heat and pressure. due to this, the old rock was
recrystallized and has a higher density
recrystallized and has a lower density
melted and has a lower density
melted and has a higher density

Explanation:

Metamorphic rocks form via heat and pressure (not melting, which is for igneous rocks). Heat/pressure cause recrystallization, and the compacting from pressure increases density. So the old rock is recrystallized with higher density.

Answer:

recrystallized and has a higher density (the first option)