The active divergent plate boundaries take place amid the oceanic plates and prevail as mid-oceanic ridges. The divergent boundaries also produce volcanic islands that take place when the plates move away to generate gaps that molten lava elevates to occupy.
A convergent plate boundary refers to a tectonic boundary where two plates come towards each other. If the two plates are of the same density, they generally push up against each other, producing a chain of the mountain. However, if they are not of equal density, then one plate generally sinks under the other in a subduction zone.
Thus, in the given image, two on the left are divergent plate boundary and two on the right are the convergent plate boundary.
