What situation prompts the need for administering oxygen to a passenger?

Administering oxygen to a passenger is crucial in situations where they are experiencing chest pains. This condition can signify a potential cardiovascular issue, such as a heart attack, where the heart is not receiving enough oxygenated blood. Providing supplemental oxygen can help to alleviate the strain on the heart and ensure that vital organs receive adequate oxygen, potentially preventing further complications.

In contrast, while dehydration and exhaustion are significant concerns, they do not typically warrant immediate oxygen administration. Dehydration may require fluid replacement, and exhaustion might necessitate rest, but these conditions do not imply an urgent need for oxygen. Additionally, during severe turbulence, passengers may experience discomfort or anxiety, yet this does not directly relate to their need for oxygen, which is specifically indicated by symptoms pointing toward respiratory or cardiovascular distress.