Question

1. what processes are involved in metamorphic rock changing into igneous rock?

compaction and cementation
melting and cooling
heat and pressure
weathering and erosion

Explanation:

Metamorphic rocks transform into igneous rocks when they are subjected to high enough temperatures to melt into magma or lava. This molten material then cools and solidifies to form igneous rock. Compaction and cementation form sedimentary rocks from sediments; heat and pressure form metamorphic rocks from existing rocks; weathering and erosion break down rocks into sediments.

Answer:

melting and cooling