buck learned easily, and under the combined tuition of his two mates and François made remarkable progress. (2.5)
Buck’s ability to learn enables him to survive in the North.
T'ree vair' good dogs," François told Perrault. "Dat Buck, heem pool lak hell. I tich heem queek as anyt'ing." (2.6)
Buck’s ability to learn is recognized as an asset by those around him.