The correct answer is - a fracture in Earth where movement has occurred.
The faults, or fault lines, are very common at places where there's a divergent boundary between two continental tectonic plates. They form as a result of both, the continents moving away from each other, and as a result of an earthquake, but whichever the cause, they both contribute and go hand by hand.
The faults can be found in lots of places around the world, such as the area around the Pacific coast of the United States and along the East African region as more marking and well known.
