Mountain chains can be formed by the collision of two tectonic plates. Which of the following provides the energy which pushes the tectonic plates together?

Almost 98% of earthquakes occur at the boundary of a tectonic plates when they slide against one another. despite this, indiana still has seismic zones that experience increased seismic activity. this is particularly heavy in the wabash valley fault zone in the southwest corner of the state. how do you explain how seismic activity is felt in this area?