The document discusses the four types or styles of writing, with a focus on argumentative or persuasive writing. Persuasive writing aims to convince the audience of the author's point of view by providing justifications and reasons. It is often used in opinion pieces, advertisements, reviews, and other contexts where the goal is to persuade the reader to agree with or take a particular action. The document provides examples to illustrate persuasive writing and distinguish it from merely presenting facts in an expository style.