a compelling quotation - a thought-provoking question - a speculation about future research
A conclusion paragraph should wrap up the essay. It is important not include new information that the author would need to further explain. An idea that supports the thesis should be in a body paragraph rather than developed in the conclusion paragraph. Also an explanation of information of sources should NOT be included as this would be extra information rather than a powerful summary of the author's main points. A compelling quotation, a thought-provoking question or speculation about future research all could be included because they require the reader to interact with the topic of the paper. They provide summary thoughts and/or plans to move forward with the new knowledge the reader has gained.