Answer:
The sentence that does not use figurative language is "I feel like I could take a nap after the long day of tests that I had"
Explanation:
Figurative language uses things like metaphors,similes,hyperbole's and oxymoron's. They aren't supposed to be taken literally. For example,in the first sentence,the subject didn't literally run a marathon and a triathlon in one day,they're exaggerating to show that their school day was long and tiring. However,the subject saying they feel they could take a nap is not an exaggeration,they are expressing that they are tired