Which rest position requires soldiers to maintain a relaxed posture while remaining attentive?

The position referred to as "At Ease" allows soldiers to maintain a relaxed posture while still being attentive to their surroundings and any commands that may be issued by a leader. In this position, soldiers can place their feet shoulder-width apart and must keep their heads and eyes facing forward, which demonstrates respect and readiness to respond as needed. It strikes a balance between relaxation and alertness, ensuring that personnel remain focused on their duties even while not in a position of attention.

Other options have different implications for posture and attentiveness. "Parade Rest" requires soldiers to stand with feet apart, hands clasped behind the back, and is typically more formal than "At Ease." "Stand At Ease" also allows for some relaxation but does not provide the same level of informality as "At Ease." "Rest," while allowing for even more relaxed postures, does not require the same level of attentiveness and readiness, making it less suitable for the need for soldiers to remain alert. Thus, "At Ease" best meets the criteria of a relaxed but attentive stance.