Read the passage from Part 1 of “To Build a Fire.” The Yukon lay a mile wide and hidden under three feet of ice. On top of this ice were as many feet of snow. It was all pure white, rolling in gentle undulations where the ice jams of the freeze-up had formed. North and south, as far as his eye could see, it was unbroken white, save for a dark hairline that curved and twisted from around the spruce-covered island to the south . . .

This description allows readers to visualize

the snow falling from the sky.
the water churning beneath the ice.
the frozen landscape surrounding the trail.
the varied and challenging terrain of the trail.