The most likely reason why the author begins the passage in discuss by describing Tess's memories in the barn is; To describe a painful thought that Tess has.
It follows from the task content that the author in started the passage by using the literary device; Imagery.
This is so because, the author intends to create an image of the painful thought Tess has in the audience's mind.
On this note, the aim of the author is; to describe a painful thought that Tess has.
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