Final answer:
Buck in 'The Call of the Wild' was able to adapt to his new environment due to his strong natural instinct, despite being taken from a comfortable life and faced with the brutality of the Klondike wilderness.
Step-by-step explanation:
In Jack London's The Call of the Wild, it was easy for Buck to adapt because he had a natural instinct. Buck, once living comfortably in California, gets sold into the harsh life of a sled dog in Canada. Despite the brutal conditions and treatment he encounters, Buck's innate animal nature helps him survive and even thrive in the demanding environment of the Klondike. The novel accentuates the theme of nature versus nurture by highlighting Buck's ability to revert to his wild instincts for survival.