Its dense fur is the warmest of any mammal's - it is warmer than that of the polar bear and Arctic wolf and keeps the fox at a temperature of 100 degrees Fahrenheit in winter without it having to increase its metabolic rate to maintain body temperature.
(it; keeps; the fox; at a temperature of 100 degrees Fahrenheit in winter without it having to increase its metabolic rate) (it; is; warmer than that of the polar bear and Arctic wolf) Context(it is,List([47, 52))):(Its dense fur; is; the warmest of) (it; to increase; its metabolic rate; to maintain body temperature) Context(it to increase,List([183, 204))):(it; to increase its metabolic rate to maintain; body temperature)
it is,List([47, 52)) it to increase,List([183, 204))
it it Its dense fur it it
keeps is is to increase to increase its metabolic rate to maintain
the fox at a temperature of 100 degrees Fahrenheit in winter without it having to increase its metabolic rate
warmer than that of the polar bear and Arctic wolf
the warmest of
its metabolic rate to maintain body temperature
body temperature