In design principles, how is 'movement' best described?

In design principles, 'movement' is best described as the visual flow created within a hairstyle. This concept refers to how the elements of a hairstyle are arranged to guide the viewer’s eye through the design. Movement can be achieved through various techniques such as layering, texturing, and the overall silhouette of the hair. It influences how dynamic or static a hairstyle appears, contributing significantly to its attractiveness and style. This principle is crucial for creating hairstyles that not only look pleasing but also have a sense of life and fluidity, making them adaptable to various aesthetics and trends.

The other options do not accurately capture the essence of movement in design principles. For instance, the length of hair strands pertains more to the physical characteristics of hair rather than the visual dynamics of a style. Similarly, color contrast relates to the visual impact of hues rather than the flow within the hairstyle. Lastly, the tools used to style hair address the practical application rather than the artistic concept of movement. Therefore, understanding movement as the visual flow within a hairstyle is fundamental to mastering design principles in hairstyling.