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What is the primary function of shampoo?

  1. Condition the hair

  2. Remove dirt and oils from the hair and scalp

  3. Repair split ends

  4. Strengthen the hair follicles

The correct answer is: Remove dirt and oils from the hair and scalp

Shampoo's primary function is to remove dirt and oils from the hair and scalp. Option A is incorrect because conditioning the hair is a secondary function of shampoo. Option C is incorrect because repairing split ends requires a different type of product, like a hair mask or serum. Option D is incorrect because strengthening the hair follicles is also not a primary function of shampoo. Shampoo is primarily used to cleanse the hair and scalp, making option B the correct answer.