Since Rachel has been leaning forward throughout the evening, Rachel, I believe was being lustful to Matthew in a seductive way and in human first impression Matthew leaned back in his chair. but don't take my word for it.
Answer:
Character motivation can affect a story's plot moving the plot forward and what's to come next in the story.
The answer is allegory, since allegory is a rhetorical device that convey hidden meanings through symbolic figures in a literary piece which create the meaning the author wants to portray. It is in a form of story or poem and the meaning could be political or moral, depending on the author's true meaning.
