Which fault type is primarily associated with shearing forces?

The option that pertains to shearing forces is the transform fault. Transform faults occur where two tectonic plates slide past each other horizontally. This lateral movement creates a significant amount of shear stress, which is the force that results in the deformation of rocks in a sideways manner. Because the plates are not colliding or pulling apart but rather sliding next to one another, the primary stress involved is shear.

While normal faults form due to extensional forces and reverse faults arise from compressional forces, and thrust faults are a specific type of reverse fault involving a steeper angle, the defining characteristic of transform faults is their association with shearing forces, which makes them distinct in the context of tectonic movements.