Which of the following are signs of a distressed swimmer?

The signs of a distressed swimmer are critical for lifeguards and anyone overseeing water activities to recognize promptly. A person who is struggling, gasping for air, and waving their arms is clearly demonstrating signs of distress that need immediate attention. This behavior indicates that the swimmer is having difficulty staying above water and is in a precarious situation, which can lead to drowning if not addressed quickly.

The other scenarios provided do not indicate distress. For instance, calmly floating on their back suggests that the swimmer is at ease and can manage themselves in the water. Swimming with ease and taking breaks is a sign of a strong swimmer who is likely comfortable and competent in the water. Lastly, being submerged with eyes open may indicate that the swimmer is diving or playing underwater, which doesn't necessarily signal distress unless additional context suggests otherwise. Recognizing the signs of distress is essential not only for safety but also for effective intervention.