a set of straps that are placed on a animal so they can pull something heavy
Harness
the driver of a dogsled
Musher
to make a serious promise
Vowed
someone who does something without being forced
Volunteer
a confusing system of connected passages
Maze
a person who flies an airplane or helicopter
Pilot
a type of snowstorm in which the falling snow makes it very difficult to see
Whiteout
to fill a space completely so that it becomes slow or stopped
Jammed
a severe snowstorm that goes on for a long time
Blizzard
to call out loudly
Hollered
able to think clearly
Alert
very brave
Courageous
careful about avoiding danger or risks
Cautious
to blow or rush in gusts
Gusted