Which restraint compresses one or both sides of the neck to control blood return from the brain?

The correct choice is the option that describes a restraint method specifically designed to compress the sides of the neck, thereby impacting blood flow from the brain. This method is known as a vascular neck restraint, which functions primarily by restricting the carotid arteries that supply blood to the brain. By doing so, the technique can induce a state of unconsciousness or control an individual's movements effectively.

The focus of vascular neck restraints is to apply pressure strategically to achieve control without the use of excessive force. Understanding this mechanism highlights the physical principles involved, such as the relationship between blood flow, pressure, and consciousness, which are critical in scenarios requiring rapid restraint.

The other options refer to different types of restraints or methods that do not specifically describe the action of compressing the neck to control blood return from the brain. Therefore, they do not accurately depict the intended function described in the question.