3. "Gunmetal" gray hair is a sign that the hair is highly susceptible to __ a.fading b. curling c. breaking d.tangling 4. All of the following factors are reasons to study haircoloring EXCEPT.

## Step 1<br />The term "Gunmetal" gray hair refers to a very dark shade of gray. This color is often associated with hair that is highly susceptible to fading. Fading refers to the process where the hair color gradually loses its intensity or becomes lighter over time. This is especially true for dark hair colors like gunmetal gray, which can fade quickly if not properly maintained or if the wrong products are used.<br /><br />## Step 2<br />The question asks for the factor that is NOT a reason to study hair coloring. The options provided are fading, curling, breaking, and tangling. Among these, fading, breaking, and tangling are all issues that can be addressed or prevented through proper hair care and treatment. However, curling is a natural texture of hair and is not something that needs to be studied in the context of hair coloring. Therefore, the correct answer is "curling".