Final answer:
In Shakespeare's play 'Othello', Iago manipulates Roderigo to believe that by killing Cassio, he will be able to win Desdemona's love.
Step-by-step explanation:
The question pertains to the play Othello by William Shakespeare and revolves around Iago's manipulation of Roderigo in the plot to kill Cassio. Iago convinces Roderigo that by killing Cassio, who is a rival for the affection of Desdemona, Roderigo will be closer to winning her love. Through his persuasive and insidious manipulation, Iago implies that with Cassio out of the way, Desdemona will turn to Roderigo for comfort and Roderigo will thus benefit from Cassio's absence.