deposition in water slow cooling and crystallization weathering and erosion exposure to heat and high pressure
I gave my students this multiple choice question: What process causes igneous rock to transform into metamorphic rock?

Only one answer is correct among these 4 choices:
- deposition in water
- slow cooling and crystallization
- weathering and erosion
- exposure to heat and high pressure

Could you tell me which one is correct?

exposure to heat and high pressure