Answer: tone of the poem changes in a heartbeat. There's tension.
Explanation:
The correct cause and effect relationship for the sentence given above is ONE CAUSE AND ONE EFFECT.
For the sentence given in the question, the cause is that the speaker forgot his keys and the effect was that he could not enter into his house. A cause can result into an effect and at other times, a single cause can result into multiple effects.
The correct answer for the question that is being presented above is this one: "thoughts of the characters." According to Aristotle, the events of a tragedy are connected through thoughts of the characters. We can fully understand what the tragedy is trying to talk about.
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