Final answer:
A cause-and-effect relationship in a play occurs when one action leads to another as a result.
Step-by-step explanation:
A cause-and-effect relationship in a play occurs when one action is a cause, which leads to another action that is the effect of the first action. For example, in Shakespeare's play Macbeth, the murder of King Duncan by Macbeth is the cause, which leads to Macbeth's descent into madness and eventual downfall as the effect. This cause-and-effect relationship helps to drive the plot and develop the characters in the play.
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