What is rescue breathing, and when is it indicated?

Rescue breathing is the technique of providing breaths to an individual who is not breathing but still has a pulse. This action is essential because it helps to supply oxygen to the lungs and, consequently, to the brain and other vital organs. It is indicated in situations where a person shows no signs of respiratory effort, such as gasping or spontaneous breathing, but their heart is still beating, indicating the presence of a pulse. By delivering rescue breaths, you can sustain the individual's oxygen levels and prevent brain damage or other serious complications until more advanced medical help arrives or normal breathing is restored.

The other options presented do not accurately define the proper context for rescue breathing. For example, performing mouth-to-mouth on any unconscious individual might be hazardous, especially if they are not breathing normally or if an obstruction is present. Limiting rescue breathing to only children under eight years old does not encompass the age range where it may be necessary, as all ages can experience respiratory arrest irrespective of age. Lastly, providing air when a person is choking is a different procedure altogether, as choking requires a different response to clear the airway rather than simply administering breaths.