Which theory views the earths surface as a composed of slowly moving plates?

The theory that views the Earth's surface as composed of slowly moving plates is called plate tectonics. This theory posits that the Earth's lithosphere is divided into several large and small plates that float on the semi-fluid asthenosphere beneath them. These tectonic plates interact at their boundaries, leading to geological phenomena such as earthquakes, volcanic activity, and the formation of mountains. Plate tectonics explains the dynamic nature of the Earth's surface over geological time scales.