Part 1 of Essay
When any two plates collide, some sort of activity is bound to take place. A specific type of boundary is a convergent plate boundary. At this type of boundary, two plates are moving towards each other. Neither plate is subducted into the mantle. Many things happen when plates drive into each other. Including volcanic act ....

Part 2 of Essay
.... As the plates move together, molten material from the mantle seeps up between the converging plates. The gap is closed as the plates move more into each other, locking the molten material in. This, by the way, happens at all of the convergent boundaries. After much time, pressure builds up as the molten material churns in its chamber. It gets hotter, and as we know from the laws of physics, heat rises due to its kinetic energy. So, as the pressure get to be too much, the molten material goes up. As yo ....