When starting a fire near oxygen what can happen?
Options:
- warmth
- chaos
- unpredictable
- disaster
- explosion
Let's think carefully first. Step-by-step reasoning process:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Fire and oxygen together can cause an explosion. Explosion can happen when starting a fire near oxygen. So the final answer is explosion.