How does foreshadowing function in a narrative?

Foreshadowing functions in a narrative by building suspense or hinting at events that are likely to occur later in the story. This literary device creates an expectation in the reader's mind, engaging them and encouraging them to think about how the story might unfold. Effective foreshadowing allows an author to subtly prepare the reader for major plot developments, thereby enhancing the emotional impact when those events finally happen. This technique can heighten tension and keep readers invested in the outcome, as they look for clues in earlier parts of the narrative that might suggest future events.