The phrase <em>the antique fire truck </em>is used as a complete subject, because you are including all of these words to form a subject, so it cannot be a simple one (just one word). It isn't a compound subject either, because that would be two or more words connected with a conjunction <em>and, </em>or some other one.
I can't see the side paragraph but I think its a detailed desript of his thoughts.. If I recall it correctly
elementary and early middle schoolers
I am not sure but I think it is true because if you look up in a book that it is asking this question it should have text evidence and it should tell you some facts about it
