Multiple choice What type of plate boundaries does the Mt. St. Helens and Mt. Pinatubo categorized? Transform Plate Boundary Divergent Plate Boundary Convex Plate Boundary Convergent Plate Boundary Reveal answer Fill a bubble to check yourself D Correct answer Explanation Both Mt. St. Helens and Mt. Pinatubo are located at convergent plate boundaries, where one tectonic plate subducts beneath another, creating magma that fuels explosive volcanoes.