Which of the following is a key responsibility of a lifeguard?

Supervising swimming activities is a fundamental responsibility of a lifeguard. This role involves actively monitoring pool or beach areas to ensure the safety of all patrons. Lifeguards are tasked with being vigilant and attentive, looking for any signs of distress or unsafe behavior among swimmers. Their primary goal is to prevent accidents and act quickly to respond to any emergencies. By supervising these activities, lifeguards not only help maintain a safe environment but also foster an atmosphere where swimmers can enjoy their experience without undue risk.

The other roles listed, while potentially important in certain contexts, do not align with the core duties expected from a lifeguard. For example, managing finances is not within a lifeguard's duties, and although providing first aid is part of their training, it should be done proactively rather than only when requested. Refereeing water sports might not be part of a lifeguard's responsibilities, as their focus is primarily on safety rather than officiating games.