Since I don't know what word is underlined, I will just list everything. 'Marty' is a noun, 'sensed' a verb, 'his' pronoun, 'baseball' noun, 'team' noun, 'was' verb, 'in' preposition, 'trouble' noun.
Answer:
The skunk taught Brian that food needed to be protected. The smell in the shelter, in his clothes, and in his hair was still there now, almost a month and a half later. And he had nearly smiled.
Explanation:
He believes he is a lot smarter than Ethan
I can only assume this because i don't have the whole paragraph to have context clues but yeah that is probably the answer