Is oxygen considered one element of the fire triangle?

Oxygen is indeed considered one of the essential elements of the fire triangle, which also includes heat and fuel. The fire triangle concept illustrates that all three components must be present for a fire to ignite and sustain combustion. Oxygen acts as an oxidizer, which is necessary for the chemical reaction that produces fire. In the absence of oxygen, combustion cannot occur, regardless of the presence of heat and fuel. Understanding the fire triangle is crucial in various safety and emergency response contexts, including diving scenarios, where managing potentially hazardous situations is vital for the safety of divers.