Final answer:
The correct answer is C) Isolation. Firefighters working out of sight or voice range of others are physically separated and unable to communicate easily.
Step-by-step explanation:
The correct answer to the question is C) Isolation.
When firefighters work out of sight or voice range of others, they are isolated. This means they are physically separated from other firefighters and unable to communicate easily. This can occur in situations such as fighting a fire in a large building or working in remote areas.
Isolation can pose significant challenges for firefighters as they need to rely on their own skills and resources to handle emergencies. It emphasizes the importance of proper training, preparation, and being able to make independent decisions in high-pressure situations.