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Which hair structure layer is located directly beneath the cuticle layer?

  1. Cortex

  2. Medulla

  3. Follicle

  4. Shaft

The correct answer is: Cortex

The cortex is located directly beneath the cuticle layer, while the medulla and shaft are located further down the hair strand. The follicle is not a hair structure layer, but rather the structure that surrounds and provides nutrients to the hair root. Therefore, it is located near the base of the hair follicle, not beneath the cuticle layer.