How do you write a paragraph? Element #1: Unity. Unity in a paragraph begins with the topic sentence. Element #2: Order. Order refers to the way you organize your supporting sentences. Element #3: Coherence. Coherence is the quality that makes your writing understandable. Element #4: Completeness. Although these ideas may look true in many instances, they don’t really define what the idea behind a paragraph. This is one of those subtle things in English. A paragraph is a series of sentences that are organized and coherent, and are all related to a single topic. Almost every piece of writing you do that is longer. If you are writing a paragraph as a response or answer to a particular prompt, of the whole piece. it’s for a formal essay for a class like English or literature, past.