Final answer:
The oxidation of hair color is a chemical change where the chemicals in the hair dye react with oxygen in the air, causing the color to change.
Step-by-step explanation:
The oxidation of hair color is an example of a chemical change.
Chemical changes involve a change in the chemical composition of a substance, resulting in the formation of new substances with different properties.
In the case of hair color oxidation, the chemicals in the hair dye react with oxygen in the air, causing the color to change.