Which of the following is an indicator of healthy hair?

High shine and elasticity are significant indicators of healthy hair. When hair is well-hydrated and nourished, it reflects light, resulting in a shiny appearance. This shine is typically a sign of the hair cuticles lying flat and smooth, which helps in the reflection of light. Additionally, elasticity demonstrates the hair's ability to stretch and return to its original shape without breaking, indicating that the hair is strong and resilient.

On the other hand, dry and brittle texture, dull and lifeless appearance, and frizziness with split ends are signs of unhealthy hair. Dry and brittle hair often results from over-processing, lack of moisture, or damage. A dull appearance indicates that the hair is lacking vitality and shine, while frizziness and split ends suggest damage or lack of proper care, making these options indicators of unhealthy hair rather than healthy.