What is the proper technique for delivering rescue breaths?

The technique for delivering rescue breaths involves tilting the head back to ensure that the airway is open, pinching the nose to prevent air from escaping, and providing two breaths that are delivered slowly over one second each. This method helps ensure that the breaths reach the lungs effectively while minimizing the risk of air entering the stomach, which can lead to complications such as vomiting.

By administering two breaths at a rate of one second each, the rescuer allows time for the victim's lungs to expand fully and facilitates better oxygenation of the blood. This approach is critical, as it balances the need for sufficient air volume with the risk of causing harm through overly forceful breathing.

Other options may suggest incorrect techniques, such as blowing hard, which can lead to excessive pressure, or providing continuous airflow, which may not allow for proper ventilation intervals or could lead to improper breaths being delivered. Thus, the identified technique is the most effective and best practice in basic life support scenarios.