Final answer:
Macbeth dies at the hands of Macduff, further emphasizing his masculinity. Siward finds his son's death noble because he died in battle.
Step-by-step explanation:
Macbeth dies in the final act of the play. He is killed by Macduff, who was born by caesarean section and therefore fulfills the witches' prophecy that Macbeth cannot be killed by any man 'of woman born'. This further emphasizes Macbeth's masculinity because even in his death, he is shown to be a formidable and powerful figure.
After his son's death, Siward expresses pride and admiration, calling it a noble death. This is because Siward believes that dying in battle is an honorable and brave act. Siward finds solace in the fact that his son died while fighting for a noble cause, which adds to his pride and the noble nature of his son's death.