Concept:Faults are classified by the direction of movement of crustal blocks along a fault plane.
Explanation:When crustal blocks move horizontally past each other along a fault plane, the movement is called horizontal displacement.
This type of movement is typical of a strike-slip fault, which is commonly known as a tear fault.
Reverse faulting and normal faulting involve vertical movement of crustal blocks.
Isostatic adjustment is a vertical balancing movement of the earth's crust, not horizontal displacement.
Therefore, the correct term for the horizontal displacement of crustal blocks is tear faulting.
Answer:A. tear faulting