Her black men advanced across the plane, slowly marching to each successive level as a single unit.
Explanation:
This is the sentence that best conveys the idea that Waverly is at odds with her mother. In this story, we learn that Waverly and her mother struggle to communicate and to understand each other. They also have different ideas about Waverly and who she wants to be. In this example, Waverly uses the language of chess, at which she is very skilled, to describe her relationship with her mother. She imagines her mother's pieces moving ahead, marching as a unit, towards her. This suggests that Waverly is at odds with her mother.
