The excerpt that best describes the relationship between character development and the theme "relationships are our most valuable treasures" is:
"Didn't give it up," Lemon Brown said. "You don't give up the blues; they give you up. After a while you do good for yourself, and it ain't nothing but foolishness singing about how hard you got it. Ain't that right?"
This excerpt emphasizes the importance of personal experiences and connections, suggesting that the challenges and relationships we encounter shape our character and define our values. It highlights how meaningful relationships, even through hardships, contribute to one's identity and sense of worth.