What has Othello done before the play starts that makes Iago believe Desdemona’s father would be angry with him? Othello Act One, Scene One and Scene Two

Othello begins on a street in Venice, in the midst of an argument between Roderigo and Iago. The rich Roderigo has been paying Iago to help him in his suit to Desdemona, but he has seen no progress, and he has just learned that Desdemona has married Othello, a general whom Iago serves as ensign. Iago reassures Roderigo that he hates Othello. Chief among Iago’s reasons for this hatred is Othello’s recent promotion of Michael Cassio to the post of lieutenant. In spite of Iago’s service in battle and the recommendation of three “great ones” of the city, Othello chose to give the position to a man with no experience leading men in battle. As he waits for an opportunity to further his own self-interest, Iago only pretends to serve Othello.

Iago advises Roderigo to spoil some of Othello’s pleasure in his marriage by rousing Desdemona’s family against the general. The two men come to the street outside the house of Desdemona’s father, Brabanzio, and cry out that he has been robbed by “thieves.” Brabanzio, who is a Venetian senator, comes to the window. At first, he doesn’t believe what he hears, because he has told Roderigo to stay away from his daughter before and thinks Roderigo is merely scheming once again in order to see Desdemona. Iago speaks in inflammatory terms, vulgarly telling the senator that his daughter and Othello are having sex by saying that they are “making the beast with two backs” (I.i.118). Brabanzio begins to take what he hears seriously and decides to search for his daughter. Seeing the success of his plan, Iago leaves Roderigo alone and goes to attend on Othello. Like Brabanzio, Othello has no idea of Iago’s role in Roderigo’s accusations. As Iago departs, Brabanzio comes out of his house, furious that his daughter has left him. Declaring that his daughter has been stolen from him by magic “charms,” Brabanzio and his men follow Roderigo to Othello.

Explanation:

the answer is   b suffix addition

it is believed to be alfred, lord himself