Which safety procedure should divers review before each dive?

Reviewing emergency procedures before each dive is essential for ensuring the safety of all divers involved. These procedures typically cover a range of important topics, including how to respond in the event of a diver going missing, equipment failure, or medical emergencies. By understanding and rehearsing these procedures ahead of time, divers can react swiftly and effectively should an unforeseen situation occur, ultimately enhancing the overall safety of the dive experience.

In contrast, while taking underwater selfies, advanced diving techniques, and navigation practices are valuable aspects of diving, they do not directly address immediate safety concerns. These topics could improve a diver's experience and skill level, but they do not replace the critical need for preparation and knowledge of emergency protocols. Prioritizing safety ensures that divers are ready to handle any problems that may arise during the dive, leading to a more enjoyable and secure diving adventure.