The correct answer is - 5) At a normal fault, tensional stress causes the hanging wall block to move downward with respect to the foot wall block. Conversely, at a reverse fault, compressional stress causes the hanging wall block to move upward with respect to the foot wall block.
Both the normal faults and the reverse faults are dip-slip faults, meaning that they experience vertical movement which is inline with the dip of the fault. Both of them can be identified by the relative movement of their hanging walls and foot wall.
The normal faults have a hanging wall that is moving downwards relative to the foot wall. This kind of movement is caused by extensional tectonics, or rather by tensional stress. The faulted section of the rocks is lengthened because of this type of processes.
The reverse faults have a hanging wall that moves upward relative to the foot wall, thus the total opposite of the normal fault. This kind of movement is caused by the compressional tectonics. The faulted section of the rocks shortens under this type of processes.
