Which of the following is an advanced delivery system in skin care?

The microsponge system is considered an advanced delivery system in skin care because it utilizes microscopic sponges embedded in formulations to encapsulate active ingredients. This technology allows for controlled release of these ingredients onto the skin, enhancing penetration and maximizing their efficacy. By using this system, products can maintain consistency, improve stability, and prolong the effects of active ingredients, leading to more effective treatment outcomes.

In contrast, other options such as foaming cleansers, facial creams, and hydrating serums are more traditional formulations that may not incorporate such advanced delivery mechanisms. While they may offer benefits for skin care, they do not utilize the sophisticated technology that characterizes a microsponge delivery system.