Question

what combination of processes can transform a metamorphic rock to sediments?
melting, crystallization, and compaction.
heating, pressure, and lithification.
exposure, weathering, and erosion.
erosion, crystallization, and melting.

Explanation:

To transform a metamorphic rock to sediments, the rock first needs to be exposed at the Earth's surface. Then, weathering (physical or chemical breakdown) and erosion (transport of broken - down material) act on it.

• Option 1: Melting, crystallization, and compaction are related to igneous rock formation and sedimentary rock lithification, not metamorphic to sediment.
• Option 2: Heating, pressure, and lithification are for metamorphism and sedimentary rock formation, not metamorphic to sediment.
• Option 4: Crystallization and melting are for igneous processes, not for producing sediments from metamorphic rock.

Answer:

C. Exposure, weathering, and erosion.