Final answer:
Cone-shaped rollers in hairstyling are used to create a strong curvature movement in hair, producing tight curls at the ends with looser curls near the scalp, due to the varying diameter from base to tip.
Step-by-step explanation:
The question pertains to the effects created by using cone-shaped rollers in hairstyling. When cone-shaped rollers are used on hair, the result is generally characterized by a strong curvature movement. This is because the cone shape provides a variation in diameter from the base to the tip, creating a tight curl at the ends and looser curls near the scalp. This kind of roller doesn’t lead to straight shapes or a consistent rate of speed in the curvature of the hair. The size and, therefore, the tension of the hair wrapped around the roller changes along the cone shape, which affects the tightness of the curl.