In the stratosphere, ultraviolet radiation is part of the ozone-oxygen cycle. When UV light hits a molecule of oxygen (O₂), it splits it into two atoms of oxygen (O). When one of these atoms comes into contact with a molecule of oxygen, they combine to make ozone (O₃) When UV light hits an ozone molecule, it splits it into a molecule of oxygen and an atom of oxygen. Based on its role in this ozone-oxygen cycle, explain why ultraviolet radiation helps make life on Earth possible?