Can some plz text me im bored

Which techniques best describe the tone the author is using in this passage?

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.

What role should teachers play in creating tolerance environment for students?