Why might Lois Lowry have included so many references to people stumbling tripping and falling in Number the Stars?

Lois Lowry may have included these references to showcase the theme of uncertainty and danger during the time of war. The act of stumbling or falling can symbolize the characters facing obstacles and challenges in their journey to survive, highlighting the difficult realities of living in a war-torn environment. Additionally, it adds a sense of tension and suspense to the story, emphasizing the risks and vulnerabilities experienced by the characters.