Transform: The plates slide past each other, one going forwards, the other going back, kind of grinding each other. A Transform Boundary is also a fault, so it causes Earthquakes mostly. Convergent: When two plates collide with each other. They form subduction mostly and trenches. They can also create volcanoes or volcanic islands. Divergent: When two boundaries move away from each other. They form rift valleys, mountain ranges
Calderas are depressions in the earth that have been made after a volcano erupts and then collapses. While Mountains could be an answer but Calderas makes more sence