What action should be avoided to maintain safety while diving?

To maintain safety while diving, it is essential to avoid certain actions that could compromise your stability or awareness. When considering walking and resting, both actions can lead to increased risks in an underwater environment.

Walking can be hazardous because the diver's buoyancy can change drastically depending on their equipment and the surrounding water conditions. This can lead to a lack of control and potential accidents, such as tripping or losing balance.

Resting inappropriately can also be unsafe, as it may lead to becoming unaware of one’s surroundings, which is critical for maintaining safety. Divers need to be vigilant about their environment and potential hazards that could arise at any moment.

Combining both walking and resting amplifies the risks involved. Therefore, it's advisable for divers to maintain active control, remain aware, and reserve these actions for more controlled situations on land or during surface intervals, rather than underwater. This approach ensures that divers remain safe and alert while they explore underwater environments.