b. THE EARTH GETS CLOSER AND FARTHER FROM THE SUN
Answer: Most of the world's volcanoes are found around the edges of tectonic plates, both on land and in the oceans. On land, volcanoes form when one tectonic plate moves under another. Usually a thin, heavy oceanic plate subducts, or moves under, a thicker continental plate.
only way they should be considered safe is when they remain unactive for a long time maybe 3 years or better because they could go unactive at any moment