Answer: F) A prologue.
Step-by-step explanation: A prologue is a separate introductory section that comes before the main body of a poem, novel, or play, and gives some background information or sets the stage for the story to come. A prologue can include a presentation of the main characters and setting, an explanation of some background event or events, etc. In general, the prologue sets the tone, and prepares the audience to the story.