The first and the third sentences contain parallel structures. Parallel structure, or parallelism, is the repetition of the same grammatical structure or form within a sentence, so it becomes more balanced, and, therefore, more readable and clear to understand.
In the first sentence, the parallel structure has been used in the comparison: "... would make war <em>rather than let</em> the nation survive and accept war<em> rather than let</em> it perish..."
In the third sentence the same grammatical form has been used too: "<em>all dreaded it </em>(1) <em>all sought to</em> avert <em>it </em>(2)."
<u>Answer:</u>
<em>The detail from W. W .Jacobs’s "The Monkey’s Paw" that most clearly helps to create the tension is the time where Mr Morris seems scared to keep the monkey’s paw when Mr White asks him to. </em>
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<u>Explanation:</u>
On visiting the White family, Sergeant-Major Morris takes out the monkey's paw and tells them about the story he had been told. The summary of the story was that an old fakir had put a spell on it to demonstrate the fact that destiny controlled the lives of individuals. Also, that the spell conceded a total of three wishes. Listening to this story and the conditions Mr Morris seemed scared.