Banquo has children who might inherit the crown whereas "Upon my head they placed a fruitless crown" by which he means the witches have predicted that Macbeth will be the king but will not have children to inherit. ("Fruitless crown" always makes me think of Carmen Miranda for some reason.)
Macbeth is uncomfortable around Banquo because Banquo poses a threat to his power. Banquo knows about the prophecy that Macbeth will become king and that his descendants will inherit the throne. Macbeth also feels guilty for betraying Banquo by ordering his murder.
Because his children can replace him (macbeth) in the near future.
the fact that Banquo has a larger man rod then macbeth makes him angry and uncomfortable
Banquo's ghost! Read the play.
Macbeth kills Banquo in the play and then Banquo's ghost haunts Macbeth.
No logical reason, but then fear is not a logical thing. Although Macbeth says, "My fears in Banquo stick deep," he is not totally clear about why he is afraid of him. Most likely, he is afraid that Banquo knows too much about him, knows what the witches said to him and how troubled he was by it, and as a result may suspect Macbeth of murdering Duncan. He is also annoyed by the prophecy of the "fruitless crown" and the prophecy that Banquo will be the father to kings. To prevent this, Macbeth would have to kill not only Fleance but also Banquo, to prevent Banquo from fathering more children. This prophecy does not threaten Macbeth, yet he feels threatened by it. All of this makes the ball of anxiety which he feels because of the murder focus irrationally on Banquo.
Macbeth fears Banquo hearing his heartbeat because he is anxious about his guilty conscience being exposed. The sound of his heartbeat could signify his nervousness and guilt over the murders he has committed. Macbeth believes that Banquo suspects him and is wary of any signs that might give him away.
Macbeth's best friend was Banquo. They fought together in battle before Macbeth's rise to power.
Macbeth sees the ghost of the recently murdered Banquo.
Macbeth kills Banquo in the play and then Banquo's ghost haunts Macbeth.
No, Lady Macbeth is not aware that Macbeth has planned the death of Banquo and Fleance.
Macbeth's soldiers do not kill Banquo, Macbeth hires three murderers to do the job.
In Act 3 of Macbeth, Macbeth becomes suspicious that Banquo poses a threat to his throne. He worries that Banquo's descendants will inherit the crown, as the witches prophesied. This suspicion leads Macbeth to plot Banquo's murder.
Macbeth kills him because Banquo starts to work out that Macbeth killed dDuncan
Macbeth doesn't confide in Banquo because he sees Banquo as a threat to his ambition. Banquo's descendants are said to be kings according to the witches' prophecy, which poses a risk to Macbeth's position as king. Macbeth becomes increasingly paranoid and seeks to eliminate anyone who might challenge his rule.
It is not known who kills Banquo but it is Macbeth who orders for him to be murdered.