Which of the following will cause a nail tip to crack?

Trimming a nail tip with a fingernail clipper can lead to cracks for several reasons. When nail tips are applied, they are typically designed to have a specific structure that allows them to withstand stress. Using a clipper might create a point of weakness at the edge of the tip, especially if the clippers aren't aligned properly or if too much pressure is applied. This uneven force can result in cracks or fractures along the area that was trimmed.

Additionally, nail tips should generally be filed instead of clipped to maintain their integrity. Filing allows for a smoother adjustment to the desired length, which helps to preserve the angle and strength of the tip. Thus, while other factors can influence the durability of a nail tip, the act of trimming with a clipper is particularly prone to causing damage and cracking.