A liver transplant is surgery to replace a diseased liver with a healthy liver from another person. A whole liver may be transplanted, or just part of one. In most cases the healthy liver will come from an organ donor who has just died. Sometimes a healthy living person will donate part of their liver. A living donor may be a family member. Or it may be someone who is not related to you but whose blood type is a good match. People who donate part of their liver can have healthy lives with the liver that is left.
Stratovolcanoes are typically located on continental crust above subducting plates and are easily recognized by their often beautiful symmetrically-shaped cones (Mt. Fuji in Japan is probably one of the better known examples). Photo of Mt. Hood in Oregon, a stratovolcano that has been somewhat eroded by glacial activity.
A volcanic arc of stratovolcanoes forms on the overriding plate. These volcanoes do not erupt as frequently as shield volcanoes that form over hot spots. The two largest volcanic eruptions of the 20th century were stratovolcanoes in these zones. Two oceanic plate converge. If two oceanic plates converge the heavier and denser of the two plates subducts into the upper mantle. The Aleutian Islands in Alaska have formed as the Pacific Plate subducts beneath the North American Plate.