Answer:
When the audience of a story knows more than the characters involved, the type of irony employed is dramatic irony.
Step-by-step explanation:
Dramatic irony is commonly used in books and even in movies. The audience has information that the characters do not have, which creates tension and suspense in some cases and, in others, allows the audience to predict the outcome.
What happens in Shakespeare's "Romeo and Juliet" is probably one of the most famous examples of dramatic irony. The tragedy that takes place at the end of the story is precisely due to the information Romeo does not have. The audience knows Juliet is alive, but Romeo thinks she is dead, which makes him kill himself. The audience most likely feels sad and frustrated, after all, had Romeo known what they know, things could have turned out differently.