The body paragraphs in an essay should develop the topic, prove points, and have a consistent pattern. A paragraph contains a topic sentence stating the main idea, supporting sentences with details and examples, and optionally a concluding sentence summarizing the key points. Topic sentences should be complete sentences that are neither too broad nor narrow in scope. Supporting sentences explain, prove, or expand on the topic sentence with facts, examples, statistics or quotations. A concluding sentence restates the main idea or summarizes the key points of the paragraph.