Hello! The movement of these tectonic plates is likely caused by convection currents in the molten rock in Earth's mantle below the crust. Earthquakes and volcanoes are the short-term results of this tectonic movement. The long-term result of plate tectonics is the movement of entire continents over millions of years
Also, just as a heads up. I saw the previous person posted a link. Remember not to click any links that lead to domains which are unknown to you. They could hold a virus.