Answer: Emilia gives it to Iago
Explanation: Emilia gave the handkerchief to Iago for the simplest of reasons: she didn't realize how important it was going to be, and he was her husband (and she wanted to please him). ... Iago convinces Othello that Cassio gave it to Bianca, which convinces him that Cassio and Desdemona are having an affair.
