Final answer:
The conversation between Macduff and Malcolm in Macbeth develops the theme of political and moral legitimacy of kings versus tyranny.
Step-by-step explanation:
The conversation between Macduff and Malcolm in Macbeth develops the theme of political and moral legitimacy of some kings versus the tyranny of others. This conversation explores the qualities and characteristics that make a king legitimate and just, contrasting them with the actions of a tyrant. For example, Malcolm tests Macduff's loyalty by pretending to be morally unfit to rule, thereby emphasizing the importance of virtues such as integrity and compassion in a leader.