In which scenario would a defensive operation be most appropriate?

A defensive operation is employed when the priority is to minimize the risk to firefighters, especially in situations where the fire cannot be effectively controlled or extinguished. This approach typically involves protecting exposures, containing the fire to prevent it from spreading, and ensuring the safety of personnel while taking a more conservative approach to fire combat.

In scenarios where rapid extinguishment or direct attack is possible, such as when a fire is accessible or when additional resources are readily available, a more aggressive offensive strategy can be pursued. However, when conditions suggest that the risks to firefighters are too great—such as fire behavior, structural integrity concerns, or inadequate resources—a defensive posture becomes significantly more appropriate. This prioritization helps protect firefighters' lives while still aiming to control the situation effectively.