Read this excerpt from The Call of the Wild by Jack London.
What does this excerpt reveal about the setting of the
story?
At the first step upon the cold surface, Buck's feet sank
into a white mushy something very like mud. He sprang
back with a snort. More of this white stuff was falling
through the air. He shook himself, but more of it fell upon
him. He sniffed it curiously, then licked some up on his
tongue. It bit like fire, and the next instant was gone. This
puzzled him. He tried it again, with the same result. The
onlookers laughed uproariously.
O It is a work site with dangerous equipment.
O It is a tourist destination with unfamiliar sights.
O It is a more heavily populated town than Buck has
ever seen.
O It is a colder climate than Buck has ever experienced.

The correct answer to the question: What does the excerpt reveal about the setting of the story?, is The lack of civilization is a persistent danger.

Explanation:

In this adventure novel by Jack London, and published in 1903, especially starting from chapter 2, we learn about the adventures that a St. Bernard cross with Scottish Shepherd, called  Buck, must face when he is sold to a couple of French-Canadian dispatchers, called Francois and Perrault, and he must become part of a pack of sled-leading dogs, whose leader is the terror, Spitz and who work in the Klondlike region of Canada. The answer chosen, A, is the correct choice, as what is described by the narrator, as he talks about what Buck faces at the start of chapter 2, is that Buck must face the reality that he is no longer in his sunny and comfortable life in California, but is facing a situation where danger, especially from his dog companions and also humans, is constant. There is a total lack of civilization brought on by the roughness of the landscape, the situation and the animals and humans themselves. Buck soon realizes that danger here is a constant companion. This can be seen from the excerpt itself, when it says: "There was need to be constantly alert; for these dogs and men were not town dogs and men."

i'd assume india mainly because of how isolated japan was.   plus it is a whole china away.

this article will give you all the answers you need ; )

hope this has you! : )