Final answer:
The primary responsibilities of a lifeguard include inspecting the pool and rescue equipment and actively searching their assigned zone to ensure the safety of patrons in the water. Lifeguards should also be prepared to rescue victims from water hazards and administer first aid if needed.
Step-by-step explanation:
The subject of this question is Health and the grade level is High School. The primary responsibilities of a lifeguard include inspecting the pool and rescue equipment before the facility opens and actively searching their assigned zone.
In addition to this, lifeguards should be prepared to rescue victims from water hazards and administer first aid and cardiopulmonary resuscitation to injured persons, just like firefighters and first responders would do in emergency situations.
Therefore, the main role of a lifeguard is to ensure the safety of patrons in the water and respond effectively in case of emergencies.