Answer:
Macbeth reacts in fear while Banquo is not afraid this demonstrates Macbeth's reaction to his being called the Thane of Cawdor and the prediction that he will be king. To flinch is to withdraw from as if from pain or anticipated pain, to tense the muscles involuntarily in anticipation of discomfort. Macbeth recoils, tenses up, withdraws.
Explanation:
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