The document discusses the key elements and rules for writing a paragraph. A paragraph consists of a group of related sentences that develop a main idea. There are five main rules for organizing paragraphs: 1) indent the first line, 2) decide on a main idea and include supporting details, 3) begin each sentence with a capital letter, 4) end each sentence with appropriate punctuation, and 5) do not number or bullet sentences. Following these rules will help ensure a paragraph is complete.