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What portion of the hair provides strength, elasticity, and natural color?

  1. Medulla

  2. Cortex

  3. Cuticle

  4. Follicle

The correct answer is: Cortex

The medulla is the innermost layer of the hair shaft and its main function is to provide support and structure. It does not contribute to the strength, elasticity, or natural color of hair. The cuticle is the outermost layer of the hair shaft and its main function is to protect the inner layers. While it helps with strength and elasticity, it does not contribute to the natural color of hair. The follicle is the structure beneath the skin that produces hair. It is responsible for the nourishment and growth of hair, but does not directly contribute to its strength, elasticity, or natural color. The correct answer, the cortex, is the middle layer of the hair shaft and is responsible for providing strength, elasticity, and natural color. It contains melanin, the pigment that gives hair its natural color, and also contains protein bonds that give hair its strength and flexibility. Therefore, B is the correct answer.