Final answer:
Hair bonding, or glue-in extensions, is a method where hair is attached to the client's hair using a special adhesive. It involves applying hair bonding glue to weft of extensions and carefully attaching them to the natural hair.
Step-by-step explanation:
The method that describes attaching hair to the client's hair by using a special adhesive is known as hair bonding or glue-in extensions. This technique involves selecting a track of hair extension and applying a special adhesive or hair bonding glue to the weft of the extension, then pressing it on to the natural hair close to the scalp. Hair bonding is a relatively quick method of hair extension application, but it requires precision and care to ensure that the adhesive does not touch the scalp and that the extensions are blended well with the natural hair.