Final answer:
The sentence that uses a metaphor is 'His room is a disaster area.'
Step-by-step explanation:
The sentence that uses a metaphor is option C: His room is a disaster area.
A metaphor is a figure of speech that makes a comparison between two unlike things without using the words 'like' or 'as'. In this sentence, the room is being compared to a disaster area, indicating that it is very messy and chaotic.
Unlike a simile, which uses 'like' or 'as' to make a comparison, a metaphor directly equates two things. It creates a vivid image and adds depth to the description.
Learn more about Using metaphors in sentences