Which of the following is NOT a function of foundation?

The function of foundation primarily revolves around creating an even skin tone and enhancing the overall appearance of the skin, which aligns with two of the options provided. Foundation is designed to cover imperfections, redness, and uneven skin tones, contributing to a more uniform look.

One important function of foundation is to provide a base for makeup; it does not inherently set makeup in place. Setting makeup is generally achieved through the use of a setting powder or spray, which is applied after foundation and other makeup products to help them last longer without smudging or fading. Therefore, stating that setting makeup is a function of foundation is incorrect.

Furthermore, while some foundations offer sun protection through the inclusion of SPF, this is not universally true for all foundation products, making the protective aspect less reliable compared to other makeup products explicitly designed for sun care. The enhancement of facial features can also occur with certain formulations of foundation, but this is not a primary function. Thus, while the other choices relate to aspects commonly associated with foundation, "sets makeup" is not one of its direct functions.