The significance of the ozone layer in Antarctica primarily relates to the fact that it is getting thinner, allowing more harmful ultraviolet (UV) rays to reach Earth. This depletion of the ozone layer is a result of human-made chemicals, particularly chlorofluorocarbons (CFCs), which have been linked to ozone depletion. Increased UV radiation can lead to various negative effects, including higher rates of skin cancer, cataracts, and harmful impacts on ecosystems. Thus, the most accurate statement regarding the significance of the ozone layer in Antarctica is:
It is getting thinner, allowing more harmful ultraviolet rays to reach Earth.