Macduff is the correct answer because in the play "Macbeth" by William Shakespeare, Macduff is the one who ultimately kills Macbeth. Macduff seeks revenge for the murder of his family, which was orchestrated by Macbeth. In the final battle, Macduff confronts Macbeth and beheads him, fulfilling the prophecy that Macbeth would be defeated by a man not born of a woman. Macduff's actions lead to the restoration of peace and the end of Macbeth's tyrannical reign.