What is one piece of personal protection that lifeguards should use while on the beach?

Sun protection creams are essential for lifeguards while on the beach due to the prolonged exposure to sunlight, which can lead to harmful effects such as sunburn or long-term skin damage, including an increased risk of skin cancer. The nature of a lifeguard's role necessitates spending significant time outdoors under direct sunlight, making it vital to use effective sun protection measures.

Using sun protection creams helps in blocking harmful ultraviolet (UV) rays, thereby serving as a crucial barrier to protect the skin. This not only promotes the health and well-being of the lifeguard but also sets a positive example for beachgoers about the importance of sun safety. The other options listed do not provide the necessary protection from UV exposure and may not be practical for a lifeguard's role on the beach.