Final answer:
The term for the amount of pressure applied during hair cutting when combing or holding hair is 'tension', a pulling force along a flexible medium.
Step-by-step explanation:
The term that refers to the amount of pressure applied when combing or holding a subsection during a haircut is: a) Tension. In the context of hairstyling and haircutting, tension is a critical factor. Tension refers to the degree of tightness or looseness with which the hair is pulled or stretched during cutting or styling. Skilled hairstylists use tension to control the distribution of weight and create precise lines and shapes in the haircut. Proper tension ensures uniformity in hair length and texture. Different cutting techniques, styles, and effects can be achieved by varying the amount of tension applied. It is a fundamental concept in the art and science of hairstyling, contributing to the overall quality and precision of the haircut.