The correct answer is <span>c. to move the reader smoothly from one point to the next
They provide coherence and prevent confusion. Some of them are: "In addition to this", or "on the other hand", or similar.</span><span />
Michael Casio - Othello's lieutenant. Cassio is a young and inexperienced soldier, whose high position is much resented by Iago. ... Young, rich, and foolish, Roderigo is convinced that if he gives Iago all of his money, Iago will help him win Desdemona's hand.
If you are referring to essays, visualizing makes the conclusion easier to script because it is simply an overall summary of the things you described in the prompt. So it makes the reader and even the writer imagine what you have been presenting. Hope this helps.
Having the quality of describing; characterized by description