Which type of hair is most important in cold conditions?
layers of fat facial hair toe hair fur seals Head hair staying warm arm hair rabbit
A B C D E F G H
Almost half the body heat lost in cold conditions escapes from the head.
Head hair is especially important in cold conditions. 
Which type of hair is most important in cold conditions? (A) layers of fat (B) facial hair (C) toe hair (D) fur seals (E) Head hair (F) staying warm (G) arm hair (H) rabbit