Which of these fibres is used to make wool?

(a) The coarse beard hair
(b) The soft under-hair
(c) The coarse under-hair
(d) The soft beard hair

Under-hair close to the skin of sheep is used to make soft wool.

Question 5
Which set of substance is not used for making fibres?
(a) Silk, chemicals
(b) Yak hair, camel hair
(c) Husk, bones
(d) Flax, wool