Red Seal Cosmetology Practice Exam 2025 - Free Cosmetology Practice Questions and Study Guide

Hydrogen bonds are weak interactions between a hydrogen atom and an electronegative atom, such as oxygen or nitrogen. These bonds are easily broken by a stronger force, such as the polarity of water or the kinetic energy of heat. The options B, C, and D do not provide a strong enough force to break the hydrogen bonds. Oil is non-polar and does not interact with the polar hydrogen bonds, cold temperatures do not provide enough energy, and shampooing and brushing do not introduce enough force to break the bonds. Cutting or trimming may physically disrupt the bonds, but it is not the most effective way to break them. Therefore, the correct answer is A - water or heat.