West Virginia Cosmetology Board Practice Exam

To achieve a straight hairstyle, using a flat iron or a blow dryer with a round brush is essential because both tools are designed specifically for smoothing and straightening hair. A flat iron works by using heat to straighten the hair strands directly, providing a sleek finish. Similarly, a blow dryer paired with a round brush allows for tension to be applied, which helps to elongate the hair while drying, reducing frizz and keeping the hair smooth.

Each of these tools is effective in their way, as they provide control over the hair's shape and texture. The usage of a round brush while blow-drying can also create some volume and movement, while the flat iron focuses solely on achieving a straight, polished look. This combination of heat and tension is key to achieving a properly straightened hairstyle.

Other tools listed do not serve the same purpose for achieving straight hair. A round brush is helpful but is most effective when used with a blow dryer, and stand-alone styling tools such as a curling iron and hair clippers cater to different styles and effects, not specifically straightening.