Final answer:
Expository writing is a form of writing that provides a clear and concise explanation of a topic, breaking it down into components and supporting the explanation with evidence and examples.
Step-by-step explanation:
Expository writing is a genre of writing that aims to explain, clarify, or provide information on a particular subject. Unlike persuasive writing which seeks to convince, narrative writing which tells a story, or descriptive writing which paints a picture, the main purpose of expository writing is to give a clear and concise explanation of a topic for the reader's understanding. In expository writing, the writer breaks down the topic into components, explains each part in relation to the whole, and may use various forms of evidence and examples to support the explanation. A common structure for an expository essay would include an introductory paragraph that outlines the topic and the main points to be discussed, followed by body paragraphs that delve into each point with supporting details, and a concluding paragraph that summarizes the information provided and reiterates the main points.