Ozone hole is substantial depletion of ozone every year during?

Explanation

This option is correct. The substantial depletion of the ozone layer, known as the ozone hole, occurs primarily from September to November. During these months, chemical reactions involving ozone-depleting substances, such as chlorofluorocarbons (CFCs), are most active in the polar regions, leading to significant ozone loss.Now we'll look at why other options are incorrect.a) Aug - Nov: This option is partially correct. While ozone depletion does occur during these months, it typically starts becoming substantial from September onwards, reaching its peak in October, and continuing into November. So, while August is included in the period of ozone depletion, it is not typically when substantial depletion occurs.(c) Nov - Dec: This option is incorrect. While ozone depletion may continue into December, the most substantial depletion typically occurs earlier, from September to November.(d) Dec - Jan: This option is incorrect. By December and January, ozone depletion is generally less severe compared to the peak months of September to November. While some depletion may still occur, it is not typically substantial during these months.(Environmental chemistry,Introduction and Types of Pollution Factors affecting Water Quality)