Final answer:
The best supporting sentence for the passage's argument about domesticating wolves is that wolves possess natural instincts making them excellent domestication candidates.
Step-by-step explanation:
The sentence that best supports the argument of the passage regarding the rewilding and domestication of wolves is "Wolves have various natural instincts that make them excellent candidates for domestication." This statement aligns closely with the content of the passage, which discusses the potential for wolves to become accustomed to humans and the historical benefits humans have gained from domesticating dogs, an ancestor of wolves. The passage also talks about restoring ecological roles and how animals and humans have often managed to coexist, suggesting an underlying argument in favor of the compatibility between humans and wolves. Therefore, this sentence underlines the argument that wolves could integrate into human environments much like their domesticated canine descendants.