The best response to how the author develops the idea of fighting for beliefs in Crazy Horse's story is:
Describes Crazy Horse's unwavering commitment to Lakota sovereignty and way of life despite adversity.
This option encapsulates the essence of Crazy Horse's struggle and determination to defend his people and their way of life, despite the numerous challenges he faced. It emphasizes his dedication to his beliefs and the significance of his fight for Lakota sovereignty.