Final answer:
A cause-and-effect relationship in a play occurs when one action leads to another action as its effect.
Step-by-step explanation:
A cause-and-effect relationship in a play occurs when one action serves as the cause of another action, which then becomes the effect of the initial action. For example, in Shakespeare's play Romeo and Juliet, the cause of Romeo and Juliet's tragic deaths is their secret marriage and the family feud between the Montagues and Capulets. The effect of this cause is the string of events that ultimately lead to their untimely demise.
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