When one oceanic plate is subduction beneath a second oceanic plate this string of volcanoes form?

When one oceanic plate is subducted beneath another oceanic plate, it leads to the formation of a volcanic island arc. As the subducting plate descends into the mantle, it melts and generates magma, which can rise to the surface, resulting in volcanic activity. This process creates a chain of volcanoes that typically align parallel to the trench formed at the subduction zone. Examples of such volcanic arcs include the Aleutian Islands in Alaska and the Mariana Islands in the Pacific.