What is the function of tooth varnish in make-up application?

The function of tooth varnish in make-up application is primarily to create the look of a missing tooth. This specialized product can be used to cover the teeth and give the illusion of a gap, which can be particularly useful in theatrical performances or character portrayals where such a feature is required. This effect can aid in character development, allowing actors to better embody their roles and convey their characters' stories effectively.

While other options such as whitening teeth, adding shine to the lips, or enhancing the color of the gums may seem related to cosmetic enhancements, they do not accurately reflect the specific purpose of tooth varnish in the context of make-up design. The accurate understanding of the purpose and use of tooth varnish helps in realizing the depth of character creation in performance arts.