A foam blanket disrupts which component of the fire tetrahedron?

The correct answer addresses the role of a foam blanket in disrupting multiple components of the fire tetrahedron, which consists of heat, oxygen, fuel, and a chemical chain reaction. When foam is applied to a fire, it creates a barrier that effectively cuts off the oxygen supply to the flames. This is essential because oxygen is one of the key elements needed for combustion.

Additionally, the foam blanket can smother the flame and physically block or cool the fuel source, thus reducing the potential for re-ignition and controlling heat. The foam's ability to insulate and cool further disrupts the heat component, as it can absorb heat and lower the temperature of the burning materials.

Given its multifunctional approach in targeting these elements—by denying oxygen, suppressing heat, and covering fuel—the foam blanket effectively disrupts all components of the fire tetrahedron. This comprehensive action is vital for successful fire suppression, making it a critical technique in firefighting strategies.