Which of the following is NOT a way foam extinguishes fuel-related fires?

Foam extinguishes fuel-related fires through several mechanisms, primarily by creating a barrier between the fuel and the fire, which is essential for effective extinguishment. Among these mechanisms, smothering the fire involves covering the fuel with foam to cut off the oxygen supply, while cooling the fuel and the heated area decreases the temperature to a point where combustion is no longer sustainable. Additionally, separating the fuel from the fire is critical, as this prevents ignition and further spread of flames.

Feeding the fire, on the other hand, contradicts the principles of fire extinguishment. This action would theoretically introduce more fuel or oxygen, which would exacerbate the situation rather than mitigate it. Therefore, recognizing that foam does not feed the fire helps clarify its role in fire suppression, reinforcing the importance of the other methods employed in using foam effectively.