Which aspect does fire cause investigation primarily focus on?

The primary focus of fire cause investigation is on the combination of fuel, ignition source, and oxidizer. This triad is fundamental to understanding how a fire starts and propagates.

In fire investigations, determine what materials provided fuel for the fire, what sparked the ignition, and how oxygen was made available to sustain combustion is crucial for establishing the cause of the fire. This understanding allows investigators to identify patterns and similarities across different fire scenarios, contributing to the safety regulations and preventive measures that can be implemented.

Other aspects, such as building design, interactions between firefighters, and historical context of previous fires, while relevant, do not directly address the fundamental mechanics of combustion that lead to the initiation and spread of fire. These other factors can provide additional context or insights but are not the primary focus when establishing the cause of a fire. The investigation is rooted in the scientific principles of fire behavior, making the relationship between fuel, ignition source, and oxidizer the essential aspect around which most fire investigations revolve.