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What is the main role of a hair conditioner?

  1. To dry the hair quickly

  2. To straighten curly hair

  3. To deposit protein or moisturizer to the hair

  4. To bleach the hair

The correct answer is: To deposit protein or moisturizer to the hair

Hair conditioner's main role is to deposit protein or moisturizer onto the hair. This helps to nourish and hydrate the hair, making it healthier and more manageable. Option A is incorrect because hair conditioner does not have the purpose of drying hair quickly. Option B is incorrect because hair conditioner is not designed to permanently straighten curly hair. Option D is incorrect because hair conditioner does not contain bleaching agents and is not used for lightening the hair.