The prepositional phrase 'in the dark serves as what part of speech?

How can a musical work be an argument

And his eyes have all the seeming of a demons that is dreaming which of these poetic devices is used here?

What is the problem with the following sentence: cameron, who has an extreme and unreasonable suspicion of other people and their motives, suffers from paranoia which is a psychological disorder characterized by delusions of persecution or grandeur, was absolutely sure that someone was following him even though he was absolutely alone and hadn't seen a car for miles and miles.