The forces responsible for the movements of the earth's crust, eruption of volcanoes and earthquakes are

The forces responsible for the movements of the earth's crust, eruption of volcanoes and earthquakes are Tectonic forces. Earth is an active planet. Its surface is composed of many individual plates that move and interact, constantly changing and reshaping Earth's outer layer. Volcanoes and earthquakes both result from the movement of tectonic plates.