Final answer:
Bleaching affects hair by removing its natural pigment and can cause damage to the hair strands.
Step-by-step explanation:
Bleaching affects hair by removing the natural pigment from the hair strands. This process is achieved by using chemicals, usually hydrogen peroxide, which break down the melanin in the hair. As a result, the hair becomes lighter or even colorless. However, bleaching can also cause damage to the hair, making it brittle, dry, and prone to breakage.
Learn more about How bleaching affects hair