Fire Triangle

Fire is a chemical reaction which needs three things to be present so it can happen: OXYGEN + HEAT + FUEL = FIRE
If one of these is not present, the fire cannot start. If one of these were taken from a fire, it would go out.

But how does this all work?

The parts of the fire triangle are these: Heat, Fuel and Oxygen.

These three parts are required for a fire to be present, so to secure against or put out a current fire we should eliminate a minimum of one of the aspects.

Various extinguisher types are created to get rid of several of those components to put out a fire.

As an example, water removes heat and foam can stop oxygen from getting in touch with fire by covering it similar to a blanket. To cut out the fuel source might be more difficult.

From

https://fireprotectiononline.co.nz/fire-triangle/