Processes form mountains due to deformation at a plate boundary. Choose the correct term:

The correct term is B) Epeirogenic.

Explanation: Epeirogenic processes refer to the large-scale vertical movements of the Earth’s crust, typically associated with the uplifting or sinking of large land masses, which can lead to the formation of mountains. This process is distinct from taphrogenic and viscoelastic processes, which do not specifically relate to mountain formation at plate boundaries. If you have any more questions or need further assistance, feel free to ask!