Natural bristle brushes have overlapping layers that clean and ?

• A. Add luster to the hair
• B. Distribute oil unevenly
• C. Cause static
• D. Detangle with more effort

Answer: (A)

The effect being tested is how natural boar bristle brushes work to make hair look shinier by using the brush’s layered bristles to move oils and smooth the cuticle. The overlapping layers are great at picking up the scalp’s natural oils and carrying them along each strand, distributing them evenly rather than in patches. When those oils coat the hair shaft evenly, the cuticle lays flatter and light reflects more smoothly, which gives the hair a healthy, natural luster. This is why the best outcome is added shine. While brushing can help remove some surface dirt, the standout result of this brushing action is the smoothing and oil distribution that enhances luster. These brushes are not primarily about causing static, and they aren’t mainly used for heavy detangling, so those options don’t fit as well.