Describe how water temperature affects the hair structure?

Water temperature can significantly influence hair structure by affecting the cuticle, the outermost layer of hair. Hot water can cause the cuticle to lift, leading to increased porosity and making hair more prone to damage and frizz. Conversely, cold water helps to close the cuticle, which can enhance shine and reduce moisture loss. Therefore, using the appropriate water temperature during washing and rinsing can help maintain healthier hair.