What supports the head when performing the shoulder drag?

The correct answer highlights the importance of maintaining stability and control over the patient's head during the shoulder drag maneuver. By placing one hand on the head, the rescuer ensures that the head is securely supported, which is crucial to prevent exacerbating any potential spinal injuries. This helps maintain a neutral position of the spine, minimizing movement that could lead to further harm.

Using the patient's clothing, support from another rescuer, or a head strap on the backboard may provide assistance during various rescue techniques, but they do not primarily focus on the direct support of the head during the shoulder drag. Each alternative is useful in specific scenarios, but the fundamental aspect of the shoulder drag is the individual rescuer's ability to maintain head stability with their hand. This direct approach safeguards the patient's neck and spinal alignment during the transport.