Read the passage from part 1 of “to build a fire.” the dog did not want to go. it hung back until the man shoved it forward, and then it went quickly across the white, unbroken surface. suddenly it broke through, floundered to one side, and got away to firmer footing. it had wet its forefeet and legs, and almost immediately the water that clung to it turned to ice. how does this setting detail advance the plot? it introduces dangers that are not visible. it establishes the man’s concern for the dog. it illustrates the availability of natural resources. it proves the impossibility of traveling alone.