Which of the following activities would classify personnel as highly exposed?

Personnel engaged in fire attack operations are classified as highly exposed due to the inherent dangers associated with entering a burning structure, encountering extreme heat, smoke, and toxic gases, and the need to navigate potentially unstable environments. This activity involves direct confrontation with fire and other immediate hazards, placing firefighters in high-risk situations where the likelihood of injury or danger is significantly elevated.

In contrast, logistics support, equipment maintenance, and public education typically involve lower levels of exposure to immediate physical dangers. While all roles are important within the fire service, they do not present the same immediate life-threatening conditions that firefighters face during an active fire attack. As such, those involved in fire attack are uniquely situated in the highest risk category, justifying their classification as highly exposed personnel.