Final answer:
Closing doors or windows and applying water or foam are actions that can reduce oxygen available to a fire before an interior attack.
Step-by-step explanation:
Before conducting an interior attack on a fire, reducing the oxygen available to the fire can help control and extinguish it. One way to do this is by closing doors or windows to limit the oxygen supply. This reduces the amount of air fueling the fire and can slow its growth and spread. Additionally, using fire suppression techniques, such as applying water or foam on the fire, can help reduce the available oxygen and smother the flames.