Which detail from "to build a fire" best supports the idea that survival was not guaranteed along the actual yukon trail? then it turned and trotted up the trail in the direction of the camp it knew, where were the other food providers and fire providers. his pace of four miles an hour had kept his heart pumping blood to the surface of his body and to all the extremities. but he was safe. toes and nose and cheeks would be only touched by the frost, for the fire was beginning to burn. a good idea, he thought, to sleep off to death. it was like taking an anesthetic. freezing was not so bad as people thought.

In the story, the newcomer was plainly cautioned and he was informed that it was "too cold to travel". This demonstrated it was not sheltered and survival was not ensured. Regardless of this notice, the newcomer took off.  

Toward the end of the story, he froze to death.

the answer is:  

he is voicing feelings shared by all humans regardless of race.

in paul laurence dunbar's poem "we wear the mask," he replicates the words mask and we to emphasize how people in general -not just black americans- hide their true feelings. he suggests the masks cover people's faces and eyes, which are the main parts that display their emotions. he also thinks people's pain conceal behind those masks, so that they cannot see reality and nobody is able to see one another's sorrow.

answer: he would chuck as much wood as he could chuck if he could chuck wood with a wood chuck