Answer:
The correct answer is A. hanging wall.
In a normal fault, the block of rock that lies above the fault plane is called the hanging wall. The hanging wall moves downwards relative to the block of rock below the fault plane, called the footwall. This type of faulting occurs where there is tensional stress in the Earth's crust, which causes the hanging wall to drop down along the fault plane. Normal faults are common in areas of extension, such as along divergent plate boundaries and in rift zones.
Step-by-step explanation: