Question

dramatic irony noun a literary device in which the audience knows something characters do not, often used to create humor, suspense or tension. use this word in a sentence or give an example to show you understand its meaning

Explanation:

Dramatic irony is when the audience has knowledge that characters lack. An example is in a horror - movie where the audience knows a monster is hiding in a closet, but the character about to open it is unaware.

Answer:

In the play, the audience knew the letter was a forgery while the protagonist was completely oblivious, creating a great deal of dramatic irony.