Which option is a sign of negligence in lifeguarding?

Not reporting an injury is a clear sign of negligence in lifeguarding because lifeguards have a legal and ethical responsibility to ensure the safety and wellbeing of all individuals within their designated area. When a lifeguard fails to report an injury, it can lead to the deterioration of a victim's condition or hamper appropriate medical intervention, which undermines the lifeguard's role as a protector. Reporting injuries is crucial for documenting incidents, ensuring that proper medical care is provided, and preventing similar occurrences in the future. By neglecting to report, a lifeguard may not fulfill their duty of care, resulting in potential legal ramifications and putting individuals at risk.

The other options encompass actions that align with the responsibilities and ethical standards expected of a lifeguard, reinforcing the idea that they are effectively performing their role.