Fact 1: Head hair is especially important in preventing heat loss from the body. Fact 2: Hair is actually composed of a protein called keratin. Given the two facts above, what is important in preventing heat loss from the body?
Choose from: [i] hydration [ii] a cuticle [iii] stay warm [iv] sweating [v] warmth [vi] skin [vii] keratin [viii] Animal fur
Answer:
[vii]