Final answer:
In a long round layer haircut, the process typically starts in the (B) crown area, which helps set the guide for the rest of the haircut. The stylist then progresses to other sections of the hair, with the perimeter often being cut last.
Step-by-step explanation:
When performing a long round layer haircut, the cutting typically begins in the crown area. This is because it allows for the creation of a guide for the subsequent layers and helps to establish the shape of the style. Starting at the crown provides a reference point for the length and layering throughout the rest of the haircut.
Once the crown area is addressed, the haircut generally progresses by working through the sections, either moving forward to the bangs or down towards the nape area, depending on the specific technique and desired outcome. Cutting the perimeter may occur towards the end to clean up the outline and ensure a polished finish.