Read the excerpt from The Call of the Wild.[Thornton] had a way of taking Buck’s head roughly between his hands, and resting his own head upon Buck’s, of shaking him back and forth, the while calling him ill names that to Buck were love names.

Thornton holds Buck’s head, rests his own head against it, and shakes him while calling him names Buck understands as expressions of love. These actions show warmth and playfulness rather than anger. The best choice is “He has a playful and affectionate nature.”

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