Which of the following is an example of personal protective equipment (PPE)?

Safety goggles are considered personal protective equipment (PPE) because they are designed specifically to protect the eyes from potential hazards in various environments, such as construction sites or laboratories. PPE is defined as gear that serves to protect the wearer's body from injury or infection, and safety goggles fulfill this function by providing a barrier against flying debris, chemical splashes, and other hazards that could cause eye injury.

In contrast, a clipboard, smartphone, and lunchbox do not serve a protective function related to personal safety. A clipboard is generally used for holding papers, a smartphone is primarily a communication device, and a lunchbox is used for storing food. None of these items provides the protective qualities that safety goggles offer, which is why they are not classified as PPE.