What is a major risk if a lifeguard is distracted while on duty?

The correct answer highlights that a major risk when a lifeguard is distracted while on duty is missing emergencies or having delayed responses. Lifeguards are responsible for the safety of swimmers, and their primary duty is to stay vigilant and alert to identify potential hazards or emergencies, such as a swimmer in distress or unsafe conditions.

When a lifeguard becomes distracted, their ability to monitor the water effectively diminishes. They may not notice someone struggling or in need of help, which can lead to serious consequences, including drowning or injury. Timely response is crucial in lifeguarding situations, as every second counts when it comes to providing assistance. Therefore, maintaining focus is essential to ensure the safety and well-being of all individuals in the water.

The other options do not accurately represent the critical importance of a lifeguard's attentiveness, as increased swimmer enjoyment, instructional errors, or personal performance improvements do not directly relate to the primary duty of a lifeguard to protect swimmers from harm.