Colorado Cosmetology Written Practice Exam 2026 - Free Cosmetology Practice Questions and Study Guide

When burned, animal hair wigs, such as wigs made from horse, goat, or yak hair, can result in a distinct and often unpleasant odor due to the natural oils and proteins present in the hair. Human hair wigs (option B) may also produce a slight odor when burned, but not as distinct as animal hair wigs. Synthetic fiber wigs (option C) do not produce any odor when burned, as they are made from man-made materials that do not contain natural oils or proteins. Wool hair wigs (option D), while naturally derived from animals, do not typically produce a noticeable odor when burned due to the way the fibers are processed and treated. Therefore, option A is the best answer.