This document provides instruction on writing paragraphs. It discusses the importance of unity, coherence, and organization in paragraphs. Unity means a paragraph should have a single main idea, and all sentences must directly relate to and support the main idea. Coherence refers to the logical flow and connection between sentences. It can be achieved through transition signals and logical ordering of ideas. Common logical orders include chronological order and order of importance. The document provides examples and exercises to help understand how to write unified and coherent paragraphs.