Answer:
Because Macbeth perceives Banquo as a threat to his position as king, he sends for his henchmen and gives them the order to kill Banquo and his son Fleance.
Explanation:
“Quick, Policles, quick!” he cried. “My pony is tethered behind yonder grove. A grey he is, with red trappings. Get you gone as hard as hoof will bear you, for if you are taken you will have no easy death.”
“No easy death! What mean you, Metas? Who is the fellow?”
<span>“Great Jupiter! did you not know? Where have you lived? It is Nero the Emperor! Never would he pardon what you have said about his voice. Quick,
man, quick, or the guards will be at your heels!” - This was the
conversation of Policles and his friend, Metas of Corinth</span>
It is when the conflict gets resolved. In a mystery it is when mystery is solved.
