Answer:
Earth's internal heat is the primary source of energy that moves the lithospheric plates or tectonic plates.
Step-by-step explanation:
The outer solid layer of the earth is made up of gigantic blocks, called tectonic plates or lithospheric plates. These plates differ in size and shape; however, a common aspect between them is that they are in constant motion and may present divergent (when moving apart) or convergent (when there is a collision between different plates) movements. These different movements are responsible for a series of phenomena on earth: earthquakes, volcanoes, distances between continents, etc.