* Heat from the Earth's core: The Earth's core generates immense heat.

* Mantle convection: This heat causes the mantle, a layer of semi-solid rock beneath the crust, to heat up and become less dense. This less dense material rises, while cooler, denser material sinks. This creates circular currents called convection currents.

* Plate movement: These convection currents drag the tectonic plates along with them. Think of a giant conveyor belt moving the plates around the Earth's surface.

Here's a simplified analogy:

Imagine a pot of boiling water. The heat from the burner causes the water at the bottom to heat up, become less dense, and rise. Cooler water at the top sinks to replace the rising water. This creates circular currents.

The same principle applies to the Earth's mantle. The hot, rising material pushes the tectonic plates apart at mid-ocean ridges, creating new crust. The cooler, sinking material pulls the plates together at subduction zones, where one plate slides beneath another.

In summary: The movement of tectonic plates is driven by the constant cycle of heat and movement in the Earth's mantle, powered by the heat from the core.