What is the primary purpose of using foam in firefighting?

The primary purpose of using foam in firefighting is to smother fire. Foam creates a blanket over the burning material, cutting off the fire’s access to oxygen, which is essential for combustion. By smothering the fire, the foam effectively suppresses flames and prevents the fire from spreading. This is particularly important in handling flammable liquids and solids, where traditional water methods may not be effective.

Foam can also help in cooling the flames, but its main function lies in its capacity to smother the fire and isolate it from its fuel and oxygen. Other options, such as enhancing visibility, may be involved in certain firefighting techniques, but they do not represent the primary function of foam in combating fire. Similarly, using foam as a lubricant is not relevant in the context of firefighting.