What does isochar represent?

Isochar represents a line on a diagram that connects points of equal char depth. This is significant in fire investigation as it helps assess the severity of a fire’s impact on materials, allowing investigators to determine the intensity and duration of a fire at specific locations. By analyzing the isochar line, fire investigators can better understand burn patterns and the conditions under which specific materials were ignited and consumed, ultimately aiding in fire cause determination.

The other options do not accurately describe isochar. For example, a fire suppression technique does not relate to the measurement of char depth. Evacuation planning is unrelated as it involves strategies for safely exiting an area during a fire, while a measurement of fire temperature is a different concept altogether, focusing on the heat produced rather than the effects of that heat on materials.