Final answer:
The foreshadowing in Friar Laurence's warning to Romeo creates suspense, characterizes the Friar, and keeps the audience engaged.
Step-by-step explanation:
The foreshadowing in Friar Laurence's warning to Romeo has multiple effects. Firstly, it creates suspense as the reader wonders why the warning is uttered, suggesting that something tragic will happen to the lovers later in the story; secondly, it characterizes Friar Laurence as a man who believes he has the ability to predict the future; and thirdly, it keeps the audience engaged in the plot by suggesting more potential conflict in the story.
Learn more about Foreshadowing in Romeo and Juliet Act II, scene v