Final answer:
Othello responds calmly and with dignity when confronted by Brabantio and his armed guards in Act I of Shakespeare's Othello, demonstrating his noble character and restraint.
Step-by-step explanation:
In Act I of Shakespeare's Othello, when Brabantio comes looking for Othello with armed guards, Othello responds with a composed and dignified demeanor, despite Brabantio's aggression and accusations of witchcraft. Othello's response showcases his confidence and the respect he commands due to his military rank and noble bearing. He handles the situation without resorting to violence, indicating his wisdom and restraint.