What is the reason a written report is required for large fires?

A written report for large fires is required primarily because it provides a permanent record of the incident. This documentation captures important details such as the circumstances of the fire, response actions taken, and any damage or injuries incurred. Having a permanent record is crucial for several reasons: it aids in ongoing investigations, assists in determining the cause of the fire, helps evaluate the effectiveness of the response, and supports future planning or risk assessments. Additionally, these reports can be used for legal purposes or to inform training and safety improvements.

While the other choices may represent benefits of documentation in general, they do not encompass the primary reason for the requirement of a written report in the context of large fires.