Oregon Cosmetology Certification Practice Exam

A diagonal line can create movement and texture in a haircut, but it does not directly contribute to building weight. A vertical line can add length and weight, but it does not necessarily build weight in a haircut. A curved line can create shape and layers, but it also does not directly contribute to building weight. A horizontal line, on the other hand, lays flat and can add density and volume to a haircut, making it the most effective way to build weight.