Final answer:
The combination of hydrogen peroxide and bleach powder allows for the lift and lightening of the hair's natural color.
Step-by-step explanation:
The combination of hydrogen peroxide and bleach powder allows for the lift and lightening of the hair's natural color. Hydrogen peroxide is commonly used as a bleaching agent for hair and is often mixed with bleach powder to achieve the desired effect. When hydrogen peroxide is applied to the hair, it acts as an oxidizing agent, breaking down the natural pigments in the hair and lightening its color.