Final answer:
In a triangular one length above the shoulders haircut, layers and graduation, blunt cut, and texturizing are all techniques that can be used, hence the answer is all of the above.
Step-by-step explanation:
When cutting a triangular one length above the shoulders haircut, the types of subsections that can be taken include layers and graduation, blunt cut, and texturizing. Layers and graduation involve cutting hair at varying lengths to create a shape that tapers and has more movement. A blunt cut is a technique where the hair is cut straight across to create a clean, even line without any layering. Texturizing is used to remove excess bulk from the hair, create internal movement, and give a softer, more blended finish to the layers. Therefore, the correct answer is 4) All of the above.