The answer is full-head bonding. Milady defines it in almost identical language to the question: the process of attaching a hair replacement system to the head with an adhesive bonding agent.
The book adds why barbers use it: full-head bonding lets the replacement system adhere to the entire head, rather than being held on with double-sided tape alone. Lace-front and partial lace fill-in describe styling and hairline solutions, not this specific whole-scalp attachment method.
Milady Standard Barbering, 6th ed., Ch. 15 (Men's Hair Replacement), p. 504: "Full head bonding is the process of attaching a hair replacement system to the head with an adhesive bonding agent."
This is 1 of the real Hair Science questions in FadeJunkie's Milady-sourced 300-question bank. See the Hair Science practice questions page for a fuller sample, or try the Hair Science practice quiz and flashcards for free. A one-time $15 lifetime pass unlocks the complete question bank across all 13 tested topics.
More real Hair Science questions with sourced answers: What Should Synthetic Hair Solutions Be Cleaned With, What Tool Blends a Hair Replacement With Natural Hair, Which Hair Type Needs a Humectant-Rich Conditioner, Which Hair Type Has Low Elasticity and Tends to Knot, and 28 more on the Hair Science practice questions page.
Browse every topic on the Practice Question Hub, or see the Texas Barber State Board Exam Guide for the full exam process — required hours, PSI scheduling, and fees.