Answer:
1. B. A movement of the earth's crust
A fault is a fracture or zone of fractures between two blocks of rock. Faults allow the blocks to move relative to each other. ... Earth scientists use the angle of the fault with respect to the surface (known as the dip) and the direction of slip along the fault to classify faults.
2. A. A normal
If the hanging wall moves down relative to the foot wall, then it is a normal fault.
3. B. Reverse
A reverse fault is one in which the hanging wall moves up relative to the footwall.