in this chapter, you have learned that a paragraph is a group of sentences that works together to develop a main idea. A paragraph consists of three part: Topic sentence, support, and concluding sentence.The topic sentence is a summary sentence. Informing the paragraph and its main idea. All other sentences in the paragraph must relate to or support the topic sentence. If any sentence does not back up the topic sentence, then it is irrelevant and must be deleted to sustain the unity of the paragraph. In addition, a paragraph requires coherence: all the ideas and sentences must be inked logically and smoothly. A good paragraph, in the end sound have a concluding sentence to restate the main idea expressed in the topic sentence