Which of the following is a sign of a distressed swimmer?

A distressed swimmer typically exhibits signs of struggle or difficulty while in the water. This can include struggling to keep their head above water, which highlights that they are likely in trouble and unable to manage their own safety. This behavior indicates that they may be experiencing fatigue, panic, or other challenges that prevent them from swimming effectively.

In contrast, swimming calmly with a smile indicates confidence and control, which suggests that the individual is not distressed. Floating on their back without assistance suggests that the person is relaxed and has the ability to float or rest, which is not a typical sign of distress. Swimming towards the shore may demonstrate awareness and an attempt to reach safety, further indicating that the swimmer is not in immediate distress. Therefore, the behavior of struggling to stay afloat is a clear and unmistakable sign of a distressed swimmer.