Concept:Vosges and Black Forest mountains are classic examples of block mountains formed by faulting.
Explanation:Block mountains are created when large sections of the Earth's crust are uplifted or tilted along faults.
The Vosges and Black Forest mountains lie on opposite sides of the Rhine Rift Valley.
During faulting, the land between parallel faults sank to form the rift valley, while the adjacent blocks were pushed upward.
These uplifted blocks became the Vosges and Black Forest mountains.
Thus, they are not residual, fold, or volcanic mountains.
Answer:B. block