Final answer:
Using a mannequin to practice cornrows helps develop (Option B) braiding skills, which involves precision, control, and fine motor skills necessary for creating tight, uniform braids along the scalp.
Step-by-step explanation:
Practicing cornrows on a mannequin is a way to develop your braiding skills. Cornrows are a style of hair braiding in which the hair is braided very close to the scalp, in an underhand, upward motion to create a continuous, raised row. This type of hairstyling requires precision and control as you're working with small sections of hair and creating a pattern that lies flat against the scalp. Using a mannequin will help you practice the tension and technique needed to achieve this hairstyle without the variability that can come from working with live models with different hair types or head shapes. Braiding, especially cornrows, involves intricate finger movements and requires the ability to maintain consistent tension on the hair strands, which is considered a fine motor skill.