Answer:
She believes that world wars are harmful to people.
Step-by-step explanation:
Anna Quindlen's essay "A Quilt of a Country" uses the metaphor of a quilt to describe America as the "melting pot" of cultures where diverse people from all backgrounds came and reside together. Written after the September 11 terror attacks, this commentary delves into what constitutes America and how it can be united at the face of a common enemy.
In the given passage, the author uses the term "fault lines" to describe what happens at times of war. She uses this term to emphasize how world wars are harmful acts for people everywhere. Irrespective of where the fighting is or who is suffering, the common people are the ones who suffer the most and thus, these fault lines are the visible identifications of how harmful wars are to human beings.