Final answer:
The character of Macduff is introduced and developed in Act II of The Tragedy of Macbeth. His reaction to King Duncan's death shows his strong moral compass, loyalty to the rightful king, and determination to bring the murderers to justice.
Step-by-step explanation:
The character of Macduff is introduced in Act II of The Tragedy of Macbeth when he discovers the murder of King Duncan. Macduff's reaction to King Duncan's death shows that he is horrified and deeply saddened by the event. He describes the murder as sacrilegious and refers to King Duncan as the Lord's anointed temple.
Macduff's character is further developed throughout the play as he becomes a key figure in the opposition against Macbeth. He shows his loyalty to Scotland and his dedication to seeking justice for King Duncan's death. Macduff's reaction to King Duncan's death reveals his strong moral compass, his loyalty to the rightful king, and his determination to bring the murderers to justice.