Final answer:
The objective in designing a style for a diamond facial type is to enhance features and balance proportions by choosing flattering hairstyles.
Step-by-step explanation:
In designing a style for a diamond facial type, the objective is to enhance the features and balance the proportions of the face. A diamond facial type is characterized by a narrow forehead, wide cheekbones, and a narrow chin. To achieve a flattering style, consider hairstyles that soften the cheekbones and create volume at the crown. Haircuts with layers or swept bangs can help balance the forehead and chin. Additionally, hairstyles that add width or fullness at the chin area can create a more harmonious look.