Final answer:
Desdemona's father in Shakespeare's play Othello is Brabantio. He is a Venetian senator who disapproves of her marriage to Othello.
Step-by-step explanation:
Desdemona's father in William Shakespeare's play Othello is Brabantio.
Desdemona is a central character in the drama, where she is the beloved wife of Othello, the Moorish general of the Venetian army.
The other options provided, such as Othello, Iago, and Cassio are all characters in the play with distinct roles: Othello is Desdemona's husband, Iago is the antagonist who schemes against Othello, and Cassio is Othello's loyal lieutenant.
Brabantio, who is a Venetian senator, is disapproving of Desdemona's marriage to Othello and plays a significant role at the start of the play, showcasing the racial and cultural tensions that are central to the narrative.