Which of the following are the surfactants used in skin cleansers?

Surfactants in skin cleansers primarily function to reduce surface tension, allowing water to mix with oil and dirt so that they can be more easily rinsed away. Detergents are indeed the type of surfactants used in skin cleansers. They help to emulsify and cleanse by breaking down oil and grime on the skin, making it cleaner and more manageable.

Emollients are ingredients that help to moisturize and soften the skin, but they do not serve the same cleansing purpose as surfactants do. Solvents are used to dissolve other substances but are not specifically surfactants; they may provide fluidity in formulations without contributing to the cleansing action. Thickeners are included in formulations to affect the consistency or texture of the product and do not have the surfactant properties required for effective cleansing. Thus, the correct identification of detergents as surfactants highlights their crucial role in the formulation of skin cleansers.