In the play The Diary of Anne Frank, how does the ending of Scene 3 build suspense by using Dramatic Irony?

In short, Peter, as a sensitive and introverted teenager, admires Anne because she is so little like him. Anne's intelligence, playful curiosity, emotional strength, and assurance of who she is and what she wants from life are all reasons why Peter admires and may even be in love with her.

Explanation:

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Otto Frank returns to a secret hiding place in which he and his family have lived during the first part of the Holocaust in Amsterdam. His friend, Miep Gies, has saved a diary that his daughter Anne kept during that time. Otto begins reading the diary aloud, and the play follows Anne's thoughts and actions, as well as those of the others hiding in the Secret Annex.