A paragraph revolves around a single idea. The first line of a paragraph often gives the main idea. All other details support the main idea of the passage.
Paragraph on a film you have recently seen
Yesterday I saw a film titled Macbeth. Its story elements are interesting. The film’s hero, Macbeth, assassinates Duncan and ascends to the throne of Scotland. But he is dissatisfied. He finds himself in a dangerous situation. He executes those he suspects of plotting against him. Eventually, some of the lords revolted and dethroned him and killed him. The message it conveys is that excessive ambition destroys a man.
The actor and actress who played Macbeth and Lady Macbeth had exceptional performances, which significantly increased the film’s impact. When the actor saw the air-drawn dagger and Banquo’s ghost, the expression of dread and confusion on his face was extraordinary.