Concept:Parallel vaulting refers to the downward sinking of land between two parallel faults, forming a rift valley.Explanation:Faulting produces major landforms like rift valleys and block mountains. When two parallel faults develop, the central block sinks under gravity due to tensional forces. This Sunken block forms a rift valley. A gorge is formed by river erosion, while an inselberg and dyke are not products of parallel faulting.Answer:B. Rift valley