Which coast of north America has the greater amount of earthquakes, volcanoes and mountain s?

There are more earthquakes on the West coast of the United States, because the boundaries of the North American, Pacific, and Juan de Fuca tectonic plates are located there. As the edges of the plates slide past or are forced under each other, the movement creates earthquakes

the answer is "a.) well–developed vascular system."

explanation:

not too sure but maybe in the hot springs.