If you hear their voices it can help you guess how they feel in the situation as well as guess the tone of the story.
The main idea of this paragraph is that they spent weeks trying to determine where the smell was coming from.
Answer:
A. It establishes that giving gifts can have a positive effect.
Explanation:
This sentance foreshadows that after Matias gives the gift, he will get some sort of positive effect from his classmate based on his reaction to the gift.
