How do these words sets the mood and tone of the story?

Tone is the attitude the writer shows toward the reader or the subject. It can affect the mood in several ways. One way is if the writer feels superior to the reader and creates a mood that might be either sarcastic or demeaning. Another writer might feel that his or her readers are witty people, and might write in a tongue-in-cheek style or create the sort of mood that reminds you of sitting in a parlor sharing quips with a friend.