Answer:
Subduction
Step-by-step explanation:
In a convergent plate boundary, two plates move towards each other. The convergence of a continental and an oceanic plate results in the formation of a subduction one, where the denser oceanic plate subducts below the lighter continental plate. The presence of this zone is usually identified by the presence of a narrow depression, commonly known as the oceanic trench. As the plate is forced into the asthenosphere layer, the rocks undergo partial melting, which mixes up with the magma. This magma again rises upward due to the force exerted by the convection current, giving rise to the formation of the volcanoes or volcanic arcs in the over-riding plate.
This process in which the denser plate goes below the less dense one is called the subduction.