How does Chaol’s physical injury serve as a metaphor for his emotional and psychological struggles throughout the novel?

How does the novel’s setting in the Southern Continent influence the plot and character development regarding Chaol and Nesryn compared to the Northern Continent in previous books in the Throne of Glass series?

How does Yrene’s backstory influence her motivations as a healer throughout the story? Use specific examples from the text to support your answer.