The scientific concept that explains the movement of continents is called plate tectonics. It is a theory that describes the large-scale motions of Earth's lithosphere, which is divided into tectonic plates that float on the semi-fluid asthenosphere beneath. These plates are constantly moving, although very slowly, due to convective currents in the mantle caused by heat from the Earth's core. Plate tectonics explains various geological phenomena such as earthquakes, volcanic activity, and the formation of mountain ranges. Understanding this concept has provided insights into the geological history of our planet and the distribution of continents and oceans.