Why do volcanoes form at tectonic plate boundaries?

Volcanoes form at tectonic plate boundaries due to the movement and interaction of Earth’s plates. At divergent boundaries, plates pull apart, allowing magma to rise and create volcanic activity, as seen at mid-ocean ridges. At convergent boundaries, one plate subducts beneath another, causing rock to melt and magma to form, leading to explosive volcanoes like those in the Ring of Fire. Volcanoes can also occur at hotspots, where magma rises through weak spots in the crust, such as the Hawaiian Islands.