Final answer:
The 'Fire Triangle' consists of fuel, heat, and oxygen, which are necessary to sustain a fire. Halon, a fire-suppressing agent, is not part of this triangle but is used to put out fires.
Step-by-step explanation:
The "Fire Triangle" consists of three essential components necessary to initiate and sustain combustion: fuel, heat, and oxygen. For a fire to occur, all three elements must be present. Therefore, the component that is not part of the "Fire Triangle" is b) Halon. Halon is actually a fire-suppressing agent used in some types of fire extinguishers to interrupt the chemical reaction that takes place during combustion, effectively helping to put out the fire.