GEOLOGY

Detailed explanation-1: -The two types of plate boundaries that are most likely to produce volcanic activity are divergent plate boundaries and convergent plate boundaries.

Detailed explanation-2: -Destructive, or convergent, plate boundaries are where the tectonic plates are moving towards each other. Volcanoes form here in two settings where either oceanic plate descends below another oceanic plate or an oceanic plate descends below a continental plate.

Detailed explanation-3: -A volcanic island arc forms in an ocean-ocean plate convergence; a volcanic continental arc forms in an ocean-continent convergence. In a contintent-contintent convergence, continental lithosphere is too low in density and thick to subduct.

Detailed explanation-4: -The new magma (molten rock) rises and may erupt violently to form volcanoes, often building arcs of islands along the convergent boundary.

Detailed explanation-5: -Oceanic-Oceanic Convergent Boundary At a convergent boundary between two plates of oceanic lithosphere, the older, denser oceanic plate will always subduct, which will cause earthquakes and form volcanic isles.