What is defined as the exact location where an ignition source first contacted the material and sustained combustion?

The term that defines the exact location where an ignition source first contacted the material and sustained combustion is the point of origin. This is crucial in fire investigations as identifying the point of origin helps determine how the fire started and its subsequent behavior. The point of origin is significant because it can provide insights into the types of materials involved, the nature of the ignition source, and potential fire spread patterns. Understanding this location is essential for effective fire management and safety practices in wildland firefighting.