It means true friends are hard to find but when you do find them hold them close because they're worth so much. Fake friends are literally everywhere around you and mean nothing/worth nothing.
The other students' in Auggie's homeroom kept their distance from him. the one student, Henry, placed his backpack on the desks between them to "build a wall." the students were not welcoming towards Auggie. Auggie is able to cover his face with a mask, in order to feel like every other kid.
Dependent clause is a group of words that contains a subject and a predicate. Although this contains a subject and a predicate, the thought is not complete and can not stand on its own. For example, "since he did not pay the rent". In this instance, the clause has a subject and a verb but shows no thought or meaning.
An independent clause is a group of words comprised of a subject and a predicate and expresses a thought thus, called independent. For instance, "I arrived early", "She sings."
Implications in an essay means what can be drawn from that essay...what was is basically about.
