Question

in addition to fuel and heat, what element must be present for fire to exist? select the best option. carbon dioxide oxygen

Explanation:

Fire is a chemical reaction (combustion). For combustion to occur, three things are needed: fuel (substance that burns), heat (to start and sustain the reaction), and an oxidizing agent. Oxygen is a common oxidizing agent that supports combustion. Carbon dioxide is used to extinguish fires as it does not support combustion.

Answer:

Oxygen