Since the questions asks about when, you would expect that the supporting detail would contain a time or date. That sentence would be:
<span><em>It is believed that Boston terriers can be traced back to a dog named “Judge” who was sold to a man living in Boston named Hooper in 1870.</em>
Therefore, it happened in year 1870.</span>
In "Dylan’s Nobel Prize settles debate: Rock lyrics are poetry" by Dan DeLuca, DeLuca's claim is stated in sentence 6. Sentence 6 reads, "The answer must be yes, because on Thursday, Dylan was awarded the highest honor for a writer: the Nobel Prize in literature." In the previous sentence, DeLuca asks if rock lyrics are poetry, which he responds to in sentence 6. DeLuca claims that in fact rock lyrics are poetry.
What is the answer? I'm here to help just comment then I will answer.
Answer: Analyzing the Effect of Sequence
It is true that only by analyzing the effect of the sequence in the story will you be able to identify how certain events heightened the tension. It is by examining which events or sequence of events get the best of the readers when it comes to impact.