I am doing a research on earthquakes but I cannot fully understand what causes earthquakes.
"Caused by a sudden releases of energy by the Earth's crust, causing seismic waves which causes the ground to shake."
"Energy release associated with rapid movement on active faults is the cause of most earthquakes."
"Earthquakes are usually caused when rock underground suddenly breaks along a fault. This sudden release of energy causes the seismic waves that make the ground shake."
I have been puzzled by these statements and I really can't seem to understand.
Do these mean that energy is released by the earth's crust then produces seismic waves, then the seismic waves make the ground shake?
Does it also mean that earthquakes often most on faults because the release of energy and seismic waves occurs near or on a fault?