A. The narrator responds to his fear by staying in the big room to learn more.
A noun is a person, place, or thing. The nouns in this sentence are the people, the places, and the things, meaning the answer is D. Boy and girl are people, school is a place, and hands are things.
"Feeling appreciated is one of the most important things in a happy family. All of the family members should say how much they appreciate each other, how great it is that they have each other, how much they love each other, and how grateful they are for everything they do for each other."