Texas Barber Exam Practice Test 2026 – Comprehensive All-in-One Guide for Exam Success!

Sebum is the correct answer because it is the natural oil produced by the sebaceous glands in the skin. Sebum helps lubricate the skin and hair, preserving the softness of the hair. On the other hand, options B, C, and D are incorrect. Decayed matter, chemical hair relaxer or perm, and bodily secretions do not have the same beneficial effects on the skin and hair as sebum does.