Charred material indicates which aspect of fire behavior?

• A. Vent path
• B. Heat release rate
• C. Fire travel
• D. Spread pattern

Answer: (C)

Charred material reveals the route the flame front took as the fire grew, showing where and how the fire traveled through the structure. When flames contact surfaces, they burn and char those surfaces, so the pattern and extent of charring indicate the path the fire followed—from room to room or along a wall and openings. This focus on the movement of the fire helps determine the fire travel. It doesn’t directly tell you vent path (air-entry and exhaust locations), nor does it quantify heat release rate, and while char patterns can inform spread, the primary takeaway is the flame’s travel route.