Question

which part of the hair extended outwards, beyond the surface of the skin?
a.) hair shaft
b.) hair matrix
c.) hair papilla
d.) hair root

Explanation:

The hair shaft is the visible part of the hair that extends beyond the skin's surface. The hair matrix is the actively dividing part of the hair bulb. The hair papilla contains blood vessels that nourish the hair. The hair root is the part embedded in the skin.

Answer:

A. Hair Shaft