Which of these elements is not a part of the fire triangle? A. Fuel B. Argon C. Oxygen D. Heat

Final answer: Argon is not a part of the fire triangle, hence, correct answer is b. Explanation: The element that is not a part of the fire triangle is B. Argon. The fire triangle is a representation of the three elements necessary for a fire to occur: fuel, heat, and oxygen. Argon is an inert gas and does not support combustion or participate in the chemical reactions that occur during a fire. For example, if you have a fire in a closed room and you replace the oxygen with argon gas, the fire will be extinguished because the necessary oxygen for combustion is no longer present.