This is the Mid-Atlantic Ridge near the shore of Iceland, it is a divergent boundary and forms underwater mountain ranges, the type of pressure that occurs here is tension.
This is where the Mid-Atlantic Ridge goes through Iceland, rock formations like this pile up and as the ground is pulled further and further apart, the rock will pile up on either side and a river will form until the entirety of Iceland eventually splits apart.
This is a transform boundary, known as the San Andreas Fault.
The type of tension that is found in transform boundaries like the San Andreas Fault, is shear tension
This is another transform boundary, known as the Alpine Fault, in New Zealand.