Give reasons for the following:

Most earthquakes are caused by tectonic movements.

Most earthquakes are caused by tectonic movements because the tectonic plates are in continuous slow motion. There is friction on their edges due to which they are stuck. Whenever there is change in the pressure exerted by them, a sudden movement or overlapping of plates occur resulting in earthquakes. Faults & folds are formed when the plates collide with each other or diverge or slide apart, the energy inside the earth crust is released in the form of vibration or earthquake along the fault line.