The answer is B. In a destructive plate boundary, the descending plate, usually the oceanic plate begins to melt as it descends below into the mantle. This forms magma that rises and erupts onto the overlying continental plate through fissures. This volcanic activity is responsible for geographical features such as the volcanic island arc, which lies parallel to the subduction zone.
I pretty sure it, <span>D) mammals began to dominate the land.</span>
<span>A: Crude oil, an important source of energy, is now extracted from beneath the ocean floor.</span>
