Answer :
Final answer:
John Thornton is Buck's best and most caring owner.
Explanation:
John Thornton can best be described as Buck's best and most caring owner. He is a kind and compassionate man who develops a deep bond with Buck. Thornton saves Buck from abuse and mistreatment, provides him with love and care, and becomes Buck's most beloved owner.
Learn more about The character John Thornton in The Call of the Wild here:
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