Which of the following describes a tactical operation involving multiple units under a command structure?

The correct answer describes a tactical operation involving multiple units under a command structure, which is referred to as branch organization. In firefighting and emergency response, branch organization is crucial for coordinating the activities of various units effectively. This structure enhances communication and facilitates efficient resource allocation during operations.

Specifically, branch organization allows for the division of responsibilities among multiple units, ensuring that different aspects of the operation, such as fire suppression, rescue, and medical care, are managed simultaneously without confusion. By assigning branches to specific tasks, the overall command structure becomes more manageable, allowing for effective oversight and adaptability in dynamic emergency situations.

This distinction in understanding command structures is critical for fire captains and other responders, as it directly impacts the execution of operations and overall mission success.