Final answer:
Highlighting is the coloring technique that involves coloring some strands of hair lighter than the natural color.
Step-by-step explanation:
The coloring technique that involves coloring some strands of hair lighter than the natural color is called highlighting. Highlighting is a popular hair coloring technique where the hairdresser applies a lighter color to selected strands of hair, creating contrast and dimension. It is commonly used to add brightness and depth to the hair without changing the overall base color.