The document discusses key features of effective body paragraphs in essays, including topic sentences, supporting sentences, and concluding sentences. It provides definitions and examples of each. A topic sentence should express the main idea of the paragraph in a complete sentence. Supporting sentences then provide additional details and explanation relating to the topic sentence. The paragraph concludes with a sentence that summarizes or leaves the reader with a final thought. Good paragraphs also demonstrate unity by keeping all sentences focused on the single topic or idea introduced in the topic sentence.