a paragraph is a series of sentences that are organized and coherent, and are all related to a single topic. Almost every piece of writing you do that is longer than a few sentences should be organized into paragraphs. This is because paragraphs show a reader where the subdivisions of an essay begin and end, and thus help the reader see the organization of the essay and grasp its main points.
It foreshadow that ceaser will be killed by his friends because they thought that he has absolute power and they will put there hands in his blood as a sin of victory