What is a sign that a lifeguard should rotate shifts with another guard?

The indication that a lifeguard should rotate shifts with another guard primarily centers on their physical and mental well-being. Feeling overwhelmed or fatigued is a critical sign that a lifeguard may not be fully alert and capable of performing their duties effectively. Lifeguarding requires continuous vigilance, focus, and quick reaction times to ensure the safety of all patrons. If a lifeguard is fatigued, their ability to notice potential dangers diminishes, potentially putting swimmers at risk. Thus, recognizing the need to rest and exchange shifts is essential for maintaining both personal safety and the safety of others.

The other options, such as wanting to socialize, observing someone else enjoying the water, or needing to check personal messages, do not provide valid justifications for a shift rotation. These activities do not pertain to the lifeguard's responsibilities or the critical nature of prioritizing safety and alertness in a lifesaving environment.