Final answer:
Plate Tectonics is the theory that explains the movement of the plates and the processes at their boundaries.
Step-by-step explanation:
The theory that explains the movement of the plates and the process that occurs at their boundaries is called Plate Tectonics. Plate tectonics is the scientific theory that describes the large-scale motion of Earth's lithosphere (the outermost layer of the Earth) and the processes that occur at the boundaries between plates.
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