Ans. The ozone hole is predominantly observed at the Antarctic region due to several factors. Firstly, the extremely low temperatures in the Antarctic polar vortex create favorable conditions for the formation of polar stratospheric clouds (PSCs). These clouds enhance the chemical reactions that deplete ozone. Secondly, during the Antarctic winter, the polar vortex isolates the region from the rest of the stratosphere, trapping ODS within the vortex and allowing them to accumulate. Thirdly, the absence of sunlight during the winter season prevents the natural regeneration of ozone, exacerbating the ozone depletion.