How does hydration benefit healthy hair?

Hydration plays a crucial role in maintaining healthy hair by preventing dryness and brittleness, which can lead to breakage. When hair is adequately hydrated, it retains moisture effectively, giving it a smooth and silky appearance. This moisture helps improve the elasticity of the hair, allowing it to stretch without breaking, which is particularly important during styling or manipulation. Elasticity is essential for maintaining healthy hair, as it directly contributes to its flexibility and strength. Therefore, proper hydration is vital for the overall health and vitality of hair, making option C the most accurate statement regarding the benefits of hydration in hair care.