Concept:Block mountains are created by earth movements that cause the crust to break and rise along fractures.Explanation:Faulting occurs when large blocks of the earth’s crust are displaced along cracks called faults.These blocks can be pushed up or dropped down by tensional or compressional forces.The raised blocks form block mountains, while the lowered blocks form rift valleys.This makes faulting the process responsible for their formation.Answer:D. faulting