Two Continental Plates colliding forming a mountain range. Source: http://web.gccaz.edu/~lnewman/gph111/topic_units/plates/14_11c.jpg
Convergent Plate Boundaries are 2 plates moving towards each other at very slow speeds, but when they collide they do not subduct because of the density of each plate. Every once in awhile at the location of these collisions there will be earthquakes, and eventually after millions of years a Mountain will form, just like when the Eurasian and the Indian plate collided to form the Himalayas. The earth under goes a type of stress called "Compression" at these boundaries.
On April 25, 2015, there was an avalanche on Mount Everest caused by an earthquake in Nepal, 17 people ended up losing their lives and one person ended up catching the avalanche on camera.
Mid-Atlantic Ridge caused by two oceanic plates diverging because of the magma inside the earth rising through the crack down the center. Source: https://www.ontrack-media.net/science8/s8m3l8image5.jpg
Divergent Plate Boundaries are two plates moving away from each other causing a Valley, Trench, Ridge or Canyon to form. The Mid-Atlantic Ridge (shown above) is a divergent boundary. The types of stress these boundaries under-go is Tension.
A Transform Boundary undergoes shear stress. Transform Plate Boundaries are two plates sliding against one another but not into or away from each other. The San Andres Fault is the most commonly known U.S. Transform Boundary.
On April 18, 1906, there was a major Earthquake it went from the San Andres Fault to San Francisco (And many other places but this one was the biggest city affected by the earthquake) which is about 296 Miles away! It caused fires and caused nearly 700 deaths, most of them occurring in San Francisco. If you wish to read more on the 1906 Earthquake (A.k.a The Great San Francisco Earthquake) you can go here. They have interactive tabs on the left of the screen if you want to read about it more.
Chile's Villarrica Volcano is a stratovolcano. Source: http://science.howstuffworks.com/nature/natural-disasters/volcano6.htm
Volcanoes (Like the one above) form when multiple Convergent Plate Boundaries collide and start to crumple up because their density is the same, which means that subduction cannot occur. Volcanoes can also form in subduction zones, when the oceanic plate sinks below the continental because it is less dense, it then causes Magma to rise through the crust and come up through volcanoes
I don't know what to think of this photo, it looks really messed up.