When Plate B is a continental plate involved in a convergent boundary with an oceanic Plate A, several geological features form on top of Plate B:

• Mountain ranges are formed due to the collision and compression of the plates, causing the continental crust of Plate B to uplift and fold

• Volcanoes form on top of Plate B as the subducting oceanic Plate A sinks beneath it and melts in the mantle. The resulting magma rises through Plate B’s crust and erupts at the surface, creating volcanic activity

In summary, on top of Plate B (the continental plate), mountains and volcanoes are typically formed due to the subduction of the denser oceanic Plate A beneath it and the associated tectonic processes