Yak are animals that live in temperatures in minus-
the wollycovering helps the yak to insulate or trap the body heat of the yak from inside and not let the cold from outside enter the works just like woollen clothes to us.  

if i helped then say thanx and mark my answer as best if it is

1 5 1
Yaks live in an extreme cold temperature so the woolly covering on it's body which prevents it from the outside cold temp. it acts like a sweater for us which traps the warm air & does not allow it to reach outside cold temperature.

hope it helps.............

plzzzzzzzzzzz mark it as brainliest

1 5 1