The correct answer is option 2: Mantle. Convection currents are movement of fluid due to difference in temperature. In the context of the Earth, the convection currents that move the tectonic plates are found in the mantle. The Earth`s mantle is a layer of semi-solid rock located between the crust and the core. It makes up the majority of the Earth`s volume.

The mantle is composed of hot and dense material, and it experiences heat from the Earth`s core. This heat causes some of the material in the mantle to rise towards the surface, while cooler material sinks back down. This circular motion of hot and cold material creates convection currents within the mantle.

These convection currents play a vital role in moving the tectonic plates, which make up the Earth`s crust. As the mantle material moves, it pushes and pulls the tectonic plates. This movement can cause the plates to separate, collide, or slide past each other, leading to various geological phenomena like earthquakes, volcanic eruptions, and the formation of mountain ranges.

It`s important to note that while the crust, outer core, and inner core are other layers of the Earth, they do not contain convection currents that directly move the tectonic plates. Consequently,