What is the role of control lines in incident management?

• A. They measure fire intensity
• B. They are decorative boundaries
• C. They are not used in handline construction
• D. They are boundaries established to manage or contain the fire; handlines are a primary type of control line

Answer: (D)

Control lines are boundaries established to manage or contain a fire, providing a safe workspace for suppression efforts and a barrier to slow or stop the fire’s spread. In practice, they define where crews work and what must be defended or allowed to burn. Handlines are a primary way to create these lines, built with hand tools to remove fuels and reach mineral soil, forming a barrier that resists ignition. This makes the description about boundaries used to manage or contain the fire, with handlines as a primary type of control line, the most accurate. The other ideas don’t fit: measuring fire intensity is about behavior observation, decorative boundaries serve no suppression role, and control lines are indeed used in handline construction.