It should be the first sentence? should be a bit more specific on the question
I believe the descriptive detail would be <span>"backlit by the noon sun"
In literature, descriptive details is anything that would create better sensory experiences among the readers.
The descriptive details involves any specific information in a certain situation in order to make the readers feel like they experiencing it directly.
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"A" I suppose because it says it's a text so she needs the picture to visualize.
B) The speech that the computer science expert gave regarding online data mining was filled with information and was also very entertaining