The convection currents that directly result in tectonic plate motion are found in the mantle.

Here's why:

* The Mantle: This layer is a thick, hot, semi-solid layer of rock. It's heated from below by the Earth's core, creating convection currents.

* Convection Currents: These currents are like giant, slow-moving rivers within the mantle. Hotter, less dense material rises, while cooler, denser material sinks. This creates a circular motion.

* Plate Movement: The movement of these convection currents drags the tectonic plates, which are the outermost layer of the Earth, along with them. This is what drives plate tectonics and causes earthquakes, volcanoes, and mountain formation.

Let me know if you have any more questions about Earth's structure!