Surfaces on the head where it changes shape, such as the ears and jawline, are known as what?

The correct answer highlights the concept of reference points in haircutting and hairstyling, which are essential for creating a balanced and well-proportioned look. Reference points are specific areas on the head that serve as markers to determine the shape and structure of a haircut. They include prominent features such as the ears, jawline, and other bony landmarks.

Understanding reference points is crucial for stylists because they help in visualizing the overall design and ensuring the haircut will work with the client's head shape and features. When a stylist considers these points, they can effectively manage the transition from length to layering, ensuring that the haircut flatters the client's face.

Surface layering, apex points, and technique points, although relevant terms in styling, do not specifically refer to the physical features used to guide haircut shape. Surface layering usually refers to a method of cutting hair to create movement, while apex points generally indicate the highest part of the head for layout purposes. Technique points relate more to methods or styles used while cutting hair rather than defining physical landmarks.