Final answer:
The world's largest ozone hole is subjected to Antarctica, primarily due to the use of chlorofluorocarbons (CFCs) and unique atmospheric conditions that facilitate ozone depletion, leading to increased ultraviolet radiation reaching Earth.
Step-by-step explanation:
The world's largest ozone hole is subjected to the continent of Antarctica. Researchers have observed significant reductions in ozone concentrations in the upper atmosphere over this region since the mid-1970s. The largest ozone hole was recorded on 24 September 2006. Atmospheric conditions unique to Antarctica, along with the breakdown of ozone molecules by chlorofluorocarbons (CFCs), are largely responsible for the formation of the ozone hole.
This colossal depletion, mostly occurring in the southern hemisphere's spring season, allows for more ultraviolet (UV) radiation from the sun to reach Earth's surface, posing potential harm to biological life.