What is a common result of improper shear tension?

Improper shear tension can lead to the fraying of hair ends and difficulty in cutting, which is why this option is the correct answer. When shears are not properly adjusted or when the stylist does not maintain the appropriate tension while cutting, the blades can cause the hair ends to split instead of creating a clean cut. This fraying can result in a ragged appearance, making the hair look unhealthy and possibly leading to further damage if not addressed. Additionally, the difficulty in cutting arises because the shears may not cleanly slice through the hair, resulting in an uneven and less precise haircut. This understanding highlights the importance of proper shear tension to maintain both the integrity of the hair and the quality of the haircut.