Final answer:
The use of synecdoche in the underlined text is appropriate to Macbeth's purpose because it provides a connection to the friendship between Banquo and Macbeth.
Step-by-step explanation:
The use of synecdoche in the underlined text is appropriate to Macbeth's purpose because it provides a connection to the friendship between Banquo and Macbeth.
In this passage, Macbeth is questioning if Banquo's patience and loyalty are strong enough to let go of his desire for revenge against Macbeth. By referring to Banquo's prayer for a good man and his issue, Macbeth indirectly alludes to Banquo's own goodness and the betrayal Macbeth feels towards his friend.
This use of synecdoche helps emphasize the complex and conflicting emotions Macbeth is experiencing, as he struggles with his actions and their consequences.