Possible answersAn ocean trench - created when a continental plate meets and oceanic plate, and the latter is subducted due to it being denser. As the oceanic plate is forced into the mantle, a deep underwater channel is created along the boundarySubmarine volcano - melting of plate material create extremely hot magma that is less dense than the surrounding mantle, so magma plumes rise up through it, and make their way up through the crust to form magma chambers, and eventually a volcanoFold mountains - created when two continental plates collide and deformation of the crust forces material to be uplifted, creating high mountain chains like the Himalayas Island arcs - often created by chains of submarine volcanoes, where two oceanic plates meet, or one continental plate meets an oceanic plate. Subduction and the generation of magma leads to eruptions of material which can then solidify and create islands