The term 'LIFEGUARD'S ACT' can be summarized as the action of a lifeguard to RESCUE someone in need. A lifeguard is a trained professional who is responsible for the safety of swimmers in a pool, beach, or other body of water. They are trained to recognize and respond quickly to emergencies, and to provide assistance to those in need. The act of rescuing someone is an important part of a lifeguard's job, and it requires quick thinking and decisive action.