Final answer:
Collision between continental plates is part of the process that leads to the exhumation of metamorphic rocks, as it results in mountain building where erosion can expose these rocks.
Step-by-step explanation:
The process that leads to the exhumation of metamorphic rocks involves erosion and tectonic activities. Among the given options, collision between continental plates is part of the process that brings deep, high-grade metamorphic rocks to the surface. This tectonic interaction often results in mountain building, with increased surface area promoting greater weathering and erosion. Over time, the removal of the overlying low-grade rocks exposes the high-grade ones that formed deeper within the Earth during the continental collision. Exposures of such rocks are most likely to be found near the center of the ancient collision zones.
Oceanic crust, including ophiolites, can also be brought to the surface at the end of the subduction process when continents collide. However, the deep burial of rocks within the Earth's mantle or the formation of sedimentary rocks are not directly involved in the exhumation of metamorphic rocks.