Answer:
It's undergoing a chemical change
Step-by-step explanation:
When hydrogen peroxide is applied to the melanin in hair, it oxidizes, and oxidation is a type of chemical change.
The melanin in Chloe's hair is decreasing. Melanin is a substance in our hair, skin, and eyes that determines pigment. If Chloe has more melanin in her hair, her hair will be darker; if Chloe has less melanin in her hair, her hair will be lighter.
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