Which factor can enhance the development of a fire in an enclosure?

High ambient temperature can significantly enhance the development of a fire in an enclosure because it increases the thermal energy available to ignite materials and sustain combustion. When the temperature in an environment rises, the ignition point of combustible materials is more easily reached. Additionally, elevated temperatures can accelerate the rate of chemical reactions involved in combustion, leading to a more intense and rapidly spreading fire.

In a scenario where the air temperature is high, any available fuels will ignite more readily, and the heat generated from the initial flames will also contribute to further heating, potentially leading to flashover. This chain reaction of increased temperature and enhanced combustion efficiency is crucial to understanding fire behavior in enclosed spaces.

While other factors like minimal ventilation could limit the spread of a fire, and reduced fuel load would diminish the fire's potential, the influence of high ambient temperature is a direct catalyst for fire development, making it a critical factor in fire dynamics.