John wanted to clean the mold out of his house. Where might he check for mold?
Options:
- jello
- carpet
- fridge
- refrigerator
- cellar Let's think step by step:

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
Cellar is a underground room in house. Cellar is attached to ground hence can have mold. So, the answer is cellar.