Answer
Option C - Ultraviolet radiation.
Explanation
The ozone layer protects living things on earth from Ultraviolet radiation. The ozone layer serves for the shorter wavelength and extremely dangerous ultraviolet radiation (UVR) from the sun, preserving life on Earth from its likely adverse impacts. When the sky is fair, there is an opposite connection between stratospheric ozone and cosmic UVR estimated at the Earth's surface.
