Why would it be dangerous to use foam extinguishers on certain fires?

Using foam extinguishers on certain fires can be dangerous because they are not suitable for fires involving flammable liquids (Class B fires) or electrical equipment (Class C fires). Foam can spread flammable liquids, worsening the situation, and may conduct electricity, posing a risk of shock or electrocution. It’s crucial to use the correct type of extinguisher for each class of fire to ensure effective suppression and safety.