Closing by return is the most common method to conclude a paragraph. This allows the researcher to highlight the purpose of the material presented in the paragraph and to remind the reader what has been proven. However, many writers make a mistake by simply restating the topic sentence, word for word. This practice detracts from the quality of the research paper and also will bore the reader. When using the closing-by-return method, re-present the topic sentence in clear and concise language that summarizes the purpose of the paragraph in a different way. Closing by return is particularly useful for paragraphs that contain a large amount of information, since it gives the researcher a chance to reemphasize the purpose of the data that has been presented.
A concluding sentence should leave a lasting impression on the reader, especially in cases where the purpose of the research paper is to encourage the reader to change his behavior. Therefore, an effective way to conclude a paragraph is by calling the reader to action. For example, if the paragraph discusses how making small changes in everyday habits could change our level of physical activity, you can use the concluding sentence to remind the reader of this premise. However, it is important to avoid hyperbole or sermonizing. For example, in the aforementioned example, do not conclude by claiming that the reader is just one step away from being "as fit as a super model." With such a conclusion, the reader will likely forget the scientific information presented in the paragraph and doubt the validity of the arguments presented.
The concluding sentence is the researcher's last words, the final chance to prove to the reader that the main idea of the paragraph is correct, and that the information in the paragraph further proves the overall thesis.Therefore, it is important to make an impression with your final sentence. For example, relate the paragraph's topic to a wider, perhaps controversial, debate about the subject. Such an approach may intrigue the reader or show him how your research relates to larger issues or fits into a more universal context.
The most important task of the concluding sentence is to provide focus for the reader. Thus, the last sentence should highlight what the researcher wants the reader to take away from the paragraph. Do not introduce new information in the concluding sentence. Make the information as clear as possible, and avoid any information that might distract the reader.