An orange qualified person entering zone 1 must monitor what?

The task of monitoring "only themselves" when entering zone 1 reflects an important focus on individual safety and awareness. In environments where the designation of zones indicates varying levels of risk or operational requirements, it is crucial for an individual to maintain personal situational awareness. This includes being aware of their own actions, potential hazards, and their immediate surroundings.

In high-risk areas, prioritizing self-monitoring helps ensure that the individual is prepared to react to any dangers or changes in their environment. By focusing solely on themselves, they can effectively manage their personal safety without being distracted by other factors. This narrow focus is particularly important in environments where external distractions could compromise an individual's situational awareness and lead to accidents or safety breaches.

Other options might suggest consideration of belongings or team members, but in the context of entering a potentially hazardous zone, the highest priority must be the individual's own safety.