The constructive force caused by the convection currents in the Earth's mantle is plate tectonics. Plate tectonics is the geological theory that describes the large-scale movement of Earth's lithosphere. The lithosphere is the solid, outermost layer of the Earth, and it is divided into several tectonic plates. These plates move around the Earth's surface, driven by convection currents in the mantle. Convection currents are caused by the uneven heating of the mantle by the Earth's core. As the mantle heats up, it becomes less dense and rises. As it cools down, it becomes denser and sinks. This movement of hot and cold mantle material creates convection currents, which drive the movement of the tectonic plates. Plate tectonics is responsible for the formation of mountains, volcanoes, and earthquakes. It also plays a role in the formation of the Earth's oceans and continents.