Natural hazards and plate tectonics

Which statement best defines a natural hazard?

Two towns lie the same distance from the same fault. Which change would most increase the hazard risk in one of them?

Which statement best explains how tectonic plates are able to move?

At a destructive margin, an oceanic plate meets a continental plate. Why do volcanoes form there?

Along California's San Andreas Fault, the Pacific and North American plates slide past each other. Why are there earthquakes but no volcanoes?