What is the best action for ensuring airway management in an unresponsive person?

In the context of airway management for an unresponsive individual, using the head-tilt, chin-lift maneuver is the most effective action. This technique is designed to open the airway by repositioning the tongue and allowing for unobstructed airflow. When a person is unresponsive, the muscles in the throat can relax, leading to potential blockage of the airway by the tongue. By tilting the head back slightly and lifting the chin forward, this maneuver helps to lift the tongue away from the back of the throat, making it easier for air to flow in and out of the lungs.

Utilizing suction devices or placing the person in a semi-sitting position may be necessary in certain scenarios when there is another complication, such as fluid obstruction, but they do not directly address the immediate need to clear and maintain an open airway in an unresponsive victim. Calling for help is crucial in emergencies; however, it is not an immediate action for ensuring that the airway remains clear. Therefore, the head-tilt, chin-lift maneuver is the preferred and primary action to take in this situation.