Final answer:
To assess the shape of a haircut, volume and texture are important factors to consider, as these elements influence the hairstyle's appearance and styling.
Step-by-step explanation:
When assessing the shape of a haircut, one should look at variables like volume and texture, as these factors contribute to the overall silhouette and style of the hairstyle. The genetically controlled aspects of hair - such as color and texture - are significant in this evaluation. Hair's color is largely due to melanin content, with eumelanin and pheomelanin determining the hue. The texture involves characteristics like curl pattern, thickness, and consistency. These traits together shape how a haircut presents itself visually and can affect styling choices and techniques.