Final answer:
Yes, it is true that fire is based on three elements, forming the fire triangle: oxygen, fuel, and heat.
Step-by-step explanation:
It is true that fire is based on three elements known as the fire triangle. These three critical components for combustion include: oxygen, fuel, and heat. Without any one of these elements, a fire cannot start or continue to burn. Oxygen is required to support the chemical processes that occur during a fire; fuel can be any combustible material that feeds the fire; and heat is necessary for the initial ignition and maintenance of the fire. The balance and presence of these elements are what enable fires to start and spread.