* Science fiction: Science fiction is a genre of fiction that deals with imagined future scientific or technological advances and their potential consequences. While some science fiction stories may be based on real science, many are not. For example, the Star Wars franchise is set in a galaxy far, far away and does not contain any elements of realism.
* Fantasy: Fantasy is a genre of fiction that deals with magical or supernatural elements. While some fantasy stories may be set in the real world, many are not. For example, the Lord of the Rings series is set in a mythical world called Middle-earth.
* Historical fiction: Historical fiction is a genre of fiction that is set in the past. While historical fiction stories must be accurate to the time period in which they are set, they do not necessarily have to be realistic. For example, the novel Gone with the Wind is set during the American Civil War, but it does not contain any elements of realism.
Therefore, it is not accurate to say that all narrative prose has elements of realism.