Final answer:
In hair design, the element that defines form and space is Line, which creates the shape and structure of the hairstyle.
Step-by-step explanation:
The element of hair design that defines form and space is Line. Lines are fundamental in creating the shape of the hair. When hair designers work on a hairstyle, they manipulate lines to form a particular shape, which can range from straight to curved. These lines contribute to the definition of space as they create the boundaries and outline of the hairstyle, giving it form and structure. Furthermore, lines can also create textural patterns that contribute to the overall aesthetics of the hair design.
The shape of a hairstyle, whether geometric or organic, is determined by the lines that create its outline or boundary. Additionally, the organization of these formal elements affects the composition and visual impact of a hairstyle. Recognizing these elements is crucial for hairstylists to not only create visually pleasing designs but also for clients and critics to evaluate and appreciate the artistry involved in hair design