Here's why:

* Hot spots are areas within the Earth's mantle where plumes of unusually hot magma rise towards the surface. This magma is less dense than the surrounding mantle material, causing it to rise and melt through the crust, creating volcanoes.

* The Hawaiian hotspot is a well-known example of a hot spot. Kilauea is one of several volcanoes that have formed over millions of years as the Pacific Plate has moved over this stationary hotspot.

While the exact cause of hot spots is still debated, they are thought to be generated deep within the Earth's mantle, possibly from the core-mantle boundary.