Geologic processes that assist in the formation of metamorphic rock include a. crystallization c. faulting b. tectonic folding d. both b and c

The answer is d)both b and c

Explanation:

When igneous rocks arise on the surface they undergo a sedimentation process, leading to the formation of sedimentary rock; if it is buried at a depth and is subjected to metamorphosis processes such as, for example, high compression forces and temperature increase, the rock will become a metamorphic rock.

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the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.