Which of the following best describes a weave?

A weave refers specifically to a technique in which additional hair is incorporated into existing hair to create a particular style or enhance fullness and length. Weaving can involve using either synthetic or natural hair, and it is done through various methods, such as braiding the natural hair and then sewing or attaching the added hair. This technique allows for versatile styling options and can create different looks while preserving the integrity of the natural hair.

The other choices do not accurately describe a weave: coloring hair pertains to changing the hair’s color rather than adding hair, cutting hair focuses on trimming or reshaping hair without adding to it, and treatments for scalp disorders specifically target issues related to the scalp's health rather than the addition of hair for styling purposes.