What are the signs of a distressed swimmer?

The signs of a distressed swimmer are characterized by visible struggle and difficulty in maintaining themselves in the water. Flailing arms indicate a person is in distress, as they may be trying to keep afloat or signal for help but are unable to do so effectively. The inability to call for help further signifies their distress, indicating that they are overwhelmed and unable to focus on anything other than the immediate survival situation. Struggling to keep their head above water is a clear indication that the swimmer is facing challenges, which may lead to panic and increase the risk of drowning.

In contrast, calm swimming with a steady stroke or floating on their back calmly indicates that a swimmer is likely relaxed and not in distress. These behaviors are typical of someone who is comfortable and in control of their swimming ability. Consistent rhythmic breathing also reflects a relaxed state, as a distressed swimmer would likely experience irregular breathing due to panic or exertion. Therefore, option A accurately encapsulates the signs of a swimmer in distress.