Final answer:
TRUE. Diagonal lines create the illusion of movement and excitement in haircutting.
Step-by-step explanation:
The statement that diagonal lines create the illusion of movement and excitement in haircutting is true.
In art, diagonal lines are often used to convey a sense of energy and motion. When applied to haircutting, diagonal lines can create dynamic and lively hairstyles that appear to be in motion.
For example, a haircut with diagonal layers or a diagonal fringe can give the illusion of movement and excitement, as the hair flows in a diagonal direction.