Ozone protects the Earth from harmful ultraviolet (UV) rays from the Sun. Without the Ozone layer in the atmosphere, life on Earth would be very difficult. Plants cannot live and grow in heavy ultraviolet radiation, nor can the planktons that serve as food for most of the ocean life. With a weakening of the Ozone Layer shield, humans would be more susceptible to skin cancer, cataracts and impaired immune systems.
Based of prion knowledge I’d probably say the last one (sorry if it’s not correct)
The correct answer for the question that is being presented above is this one: "a. white dwarfs." Most of the stars in the Milky Way will end their lives as white dwarfs. <span>A </span>white dwarf<span> is very dense: its mass is comparable to that of the Sun, while its volume is comparable to that of Earth.</span>