Which of the following is an example of an epilator?

The correct answer is wax because an epilator is defined as a device or product that effectively removes hair from the root. Waxing adheres to the hair and, when pulled away, removes the hair follicle from the skin, leading to longer-lasting smoothness compared to shaving. This method not only removes the hair but also helps to exfoliate the skin, making it a popular choice for hair removal in cosmetology.

In contrast, shaving cream is used in conjunction with razors to cut hair at the skin's surface, which does not remove the hair from the root. Laser hair removal also involves targeting hair follicles and can lead to long-lasting results; however, it operates through a different mechanism involving light technology rather than a physical method of pulling hair out. An electric razor, while a tool for hair removal, similarly cuts hair above the skin line and does not extract it from the roots. Thus, among the choices provided, wax stands out as the only true epilator.