The purpose of an introduction and an expository essay is to introduce a topic to the reader and provide a clear and concise explanation of the topic. The introduction should provide an overview of the main points to be discussed in the essay and should also provide the reader with a clear understanding of the essay's purpose. The body of the essay should then provide a detailed explanation of the topic, using evidence and examples to support the main points. The conclusion should summarize the main points and provide a final thought or opinion on the topic.
