That would be a noun. Proper nouns are more specific, and are often capitalized. For example, HE would be a noun, but if you were to say JOHN it'd be a proper noun.
I Love school
It is my fav
I really like to do something at school
I don't know what if is
I am a noob
Hey I don’t know how to get you in my room but I’m not talking to the person that I don’t need you I can not trust you I let you tell me that you I know you know what you mean you and I can tell you how I feel like I know you know I know you but I know you know I know you but I know
I believe the answer would be B because the main idea of this paragraph, is that homework is a useful tool for students. The other answers wouldn’t make sense, since they were not mentioned at all during the reading.