The document discusses the definition and elements of a paragraph. A paragraph presents a single idea or topic through multiple related sentences. It has a topic sentence that states the main idea, and other sentences that support and expand on that idea. Paragraphs can vary in length but are generally 3-8 sentences or 200-700 words. They can be independent or related/dependent and used for different functions like introduction, development, transition, or conclusion of an idea. The types and structure of paragraphs depend on the writing purpose and topic.