Which characteristic defines the diamond face shape?

The diamond face shape is characterized by having a narrow forehead and chin, with the widest part of the face being the cheekbones. This creates a pointed or angular appearance at both the top and bottom of the face. The cheeks themselves often appear full and prominent, contributing to the distinct silhouette associated with this face shape. This unique structure differentiates it from other face shapes, making option B the most accurate description of the diamond face shape.

In contrast, other characteristics presented in the options describe face shapes such as the heart shape, round shape, or square shape, which do not align with the defining features of a diamond face. Understanding these characteristics helps in personalizing beauty and skincare recommendations for clients based on their facial structure.