The correct answer is a) levels are higher near Antarctica than near the Arctic.
The ozone layer in the stratosphere varies in concentration based on geographic location. While the Antarctic region experiences a seasonal depletion of ozone (the "ozone hole") due to certain atmospheric conditions, it also tends to have higher overall ozone levels than the Arctic due to stable atmospheric conditions and cold temperatures that support ozone formation.
In general, the ozone layer tends to be thicker at higher latitudes (near the poles) than at the equator because ozone formation is influenced by factors such as sunlight exposure, temperature, and atmospheric circulation patterns. Therefore, the answer reflects the variability in ozone levels by region, particularly highlighting the differences between the Antarctic and the Arctic.