The tone is important in all writing it conveys the authors attitude towards the topic.
Usher tries to explain the nature of his illness; he suffers from a "morbid acuteness of the senses." He can eat "only the most insipid food, wear only delicate garments," and he must avoid the odors of all flowers.
Characters: Roderick Usher
Author: Edgar Allan Poe
Answer: By using an an introduction, a thesis statement, the main body, and a conclusion. Also I would recommend using the PLOT diagram.
Readers should generally use quotes from the text to support their conclusion because that way they have backup to their conclusion. If they simply give their opinion without reasoning, then their conclusion can seem sketchy.