It seems that you have missed the necessary details for us to answer this question, but hope this would help you. The line in the given passage that is considered a flashback is this: <span> She thought of her last day in middle school, seven years ago, when Sarah had given her an iPod. Have a great day!</span>
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Among the following choices, the sentence fragment is going to be: B. High up in the willow trees in the springtime. Hope that helps.
The right answers are "quite clearly mid-range pottery" and "decorated with a drape of lacy hallmarked silver"
The descriptive details of the text that best help the reader to visualize the particular Victorian tea set are these two options quoted above because they describe two physical characteristics of the Victorian tea set. Because it is a physical feature, it is easier for the reader to imagine how this tea set would look and visualize it in his mind as best he can.