Final answer:
In a round graduation haircut, the cut begins at the nape of the neck, with this section serving as a guideline for the rest of the haircut to create a rounded shape.
Step-by-step explanation:
When performing a round graduation haircut, you typically start at the nape of the neck (a). This initial section acts as a guideline for the rest of the haircut. By beginning at the nape, the hairdresser can create a strong foundation with the desired round shape taking form as the cut progresses upwards and towards the front of the head. The technique involves cutting the hair at varying angles to construct a curved or 'rounded' graduated shape, which is fuller towards the bottom and tailored at the top. After establishing the initial guideline at the nape, the stylist will continue to cut in sections, following the head's curvature and maintaining the desired tension, angle, and elevation to achieve a consistent rounded graduation throughout the hairstyle.