Missouri Board of Cosmetology Practice Exam 2024 - Free Cosmetology Practice Questions and Study Guide.

Fingerwaves are used in hairstyling to shape the hair into 's' shaped waves. Option A is incorrect because fingerwaves do not straighten the hair, they add texture and shape to it. Option C is incorrect because fingerwaves do not increase volume, instead they create the appearance of waves and movement in the hair. Option D is also incorrect because fingerwaves do not create temporary hair color, they are solely used for shaping and directing the hair into waves.