Final answer:
When cutting a long round layer haircut, diagonal, horizontal, and vertical subsections are taken to create movement, softness, and even layers throughout the haircut.
Step-by-step explanation:
When cutting a long round layer haircut, diagonal, horizontal, and vertical subsections are taken.
Diagonal subsections are used to create movement and softness in the hair. They involve cutting the hair at an angle to create layers that appear graduated.
Horizontal subsections are taken horizontally from the head to create even layers throughout the haircut.
Vertical subsections are taken vertically from the head to create vertical layers that add fullness and volume to the hair.