Can you please tell me if this sentence is in formal language and the grammar is correct?

Question

In the novel Manhattan Transfer, manifestation of the fake social face occurs. The characters use masks, because they have trouble trying to find their real self.

Answer 1

And your question is.....?

Sra

Answer 2

Is what I wrote in formal language and is the grammar correct?

Answer 3

In your final paper, you'll need to either underline or italicize the title of the novel.

No comma before "because."

The last word should be "selves."

Answer 4

Thank You so much

Answer 5

You're very welcome.