What is a necessary step between mouth-to-mouth ventilations?

The correct answer is the step of breaking the seal and taking a breath. In the process of providing mouth-to-mouth ventilations, it is essential to ensure that the rescuer has a proper airflow to deliver adequate breaths to the patient. After completing a breath into the patient's mouth, the rescuer must break the seal created by their lips to allow for proper exhalation or adjustment before delivering the next breath. This ensures that the rescuer can take in a fresh breath of air and maintain effective ventilations, which is crucial for oxygenating the patient and supporting their respiratory needs.

Understanding the importance of this step helps in managing the ventilations more effectively and efficiently. It provides the rescuer with the opportunity to re-establish a good seal for the next breath while preventing any obstruction that might occur if air is not allowed to escape after each breath delivered. Thus, it is a critical component of effective rescue breathing.