Hi.
In short, I believe the reaction you're looking for is a condensation reaction.
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I think the correct answer from the choices listed above is option A. For metamorphism to occur, the parent rock must be in solid form. Metamorphism is the alteration of the structure of a rock by factors like heat and temperature so it must be the material should be in solid form.
Answer:
atoms
Explanation:
Atoms are the building blocks of elements.
Electrons man. I think. Nah, I pretty sure....
