Final answer:
An impossible theme for 'A Long Walk to Water' is one that contradicts the novel's emphasis on survival, hope, and the impact of war. The story, which deals with struggles amid war and displacement, wouldn't support a theme centered around comfort and ease in modern society.
Step-by-step explanation:
An "impossible theme" for A Long Walk to Water would be a central idea or message that is not supported by the events, characters, or settings of the novel. It's important to understand that a theme should reflect the overall message or the deeper meanings that the author attempts to communicate through the narrative.
For example, saying that a theme of the book is the superiority of technological advancement would be impossible, as the book largely focuses on the resilience and struggles of the Sudanese characters amidst war and displacement. Themes closely linked with survival, hope, and resilience are far more fitting for this novel.
Themes in literature are the underlying messages that authors weave into their stories. In A Long Walk to Water, the book by Linda Sue Park, themes such as survival, hope, and the impact of war are prominent. An impossible theme would be one that goes against the grain of these central ideas, such as comfort and ease in modern society, or the triviality of resource scarcity.