Faults are generally closely associated with

boundaries of the tectonic plates

Explanation:

The faults are cracks that appear on the Earth's crust. They can vary a lot in length, depth, and width, and they are found in multiple places around the globe. In general, the faults are associated with the boundaries of the tectonic plates, or rather they are the ones that are the boundary between the tectonic plates, mostly between the subduction zones and the transform plate boundaries. The faults are made out of two basic parts, the foot wall and the hanging wall. The foot wall is the one that is bellow the ground, while the hanging wall is sticking above the ground. There's few types of faults, such as the strike-slip faults, dip-slip faults, and oblique-slip faults.