A divergent boundary is a type of tectonic plate boundary where two plates move away from each other. This movement creates new crust as magma rises from the mantle to fill the gap. Divergent boundaries are commonly found along mid-ocean ridges, where they contribute to the formation of new oceanic crust. As the plates separate, they can cause volcanic activity and earthquakes. The Mid-Atlantic Ridge is a well-known example of a divergent boundary, where the North American Plate and the Eurasian Plate are moving apart, leading to the creation of new seafloor.