Why did buck refuse to rise and lay on his back with four feet in the air?

Buck refused to rise and lay on his back with four feet in the air as a demonstration of his dominance and self-confidence. This behavior was a reflection of his strong instincts and understanding of the dangers of vulnerability in a harsh environment. Instead of submitting, Buck chose to maintain his position and assert his strength, showcasing his resilience and independence in a world where survival depended on such traits.