Which of the following defines tone? the attitude of the author the way the author arranges sentences the amount of dialogue used in a work an author's word choice

The option that defines tone is the first one - the attitude of the author. So, the way an author writes in his or her novel is their attitude towards the subject itself, which determines the tone of the novel too. For example, Poe often wrote dark and dreary stories, thus his tone is usually quite pessimistic and mysterious.