In Jack London's novel, "The Call Of The Wild", adaptation is essential to survival.

Crucial Changes In Jack London's novel, The Call Of The Wild, adaptation is essential to survival. First, Buck, a St. Bernard and Scotch shepherd mix, adapts to all of his surroundings to survive. Next, Spitz, a brutal dog who possesses a relentless personality, uses his force to thrive in the cutthroat world. Lastly, Hal, Charles, and Mercedes, later owners of Buck, do not acclimatize, which results in a disorderly, fatal existence. In conclusion, it is …

…in the sense that they get a feel for all of their confrontations and adapt. Hal, Charles, and Mercedes are the exact opposite, as they do not acclimatize. Buck becomes accustomed to his surroundings to survive. The ferocious Spitz employs his might to flourish in a harsh world. Hal, Charles, and Mercedes do not function correctly in the Yukon; this calls for a chaotic survival, or eternal rest. Consequently, one that cannot adapt, cannot subsist.