Final answer:
Hair coloring, or hair dyeing, is the practice of changing the hair color. It can be done to cover gray hair, add highlights, or change hair color completely.
Step-by-step explanation:
Hair coloring, or hair dyeing, is the practice of changing the hair color. It can be done to cover gray hair, add highlights, or change hair color completely. Additionally, hair lightening can be achieved through the process of coloring by using a chemical process to remove the natural color and replace it with a synthetic one. Hair coloring can be done professionally by a hairdresser or independently at home