One student made the incomplete diagram shown below to represent the relationship between magma, igneous rocks, and metamorphic rocks: three ovals, labeled from left to right, metamorphic rock, magma, and igneous rocks respectively.

Which of these is the correct next step to complete the diagram?

Put an arrow labeled cools and crystallizes, pointing from igneous rocks to metamorphic rocks.
Put an arrow labeled cools and crystallizes, pointing from metamorphic rocks to igneous rocks.
Put an arrow labeled heat and pressure, pointing from igneous rocks to metamorphic rocks.
Put an arrow labeled heat and pressure, pointing from metamorphic rocks to igneous rocks.

30 POINTS