Which of the following is an example of a physical workplace barrier?

A broken elevator exemplifies a physical workplace barrier because it directly impedes access and mobility within a physical space. Such barriers can hinder employees and visitors who may have mobility issues or may rely on elevators to reach higher floors, thus limiting their ability to perform their job functions effectively or access essential services. Physical barriers can include anything from broken equipment to inaccessible entrances, all contributing to an environment that may not accommodate all individuals equally.

The other options represent different kinds of barriers. For instance, a requirement for a high school diploma pertains to educational or credentialing barriers, which may prevent some individuals from qualifying for certain positions regardless of their ability to perform the job. Job performance standards relate to criteria that may limit opportunities for individuals based on their ability to meet these standards, rather than any physical accessibility issues. A lack of communication can hinder collaboration and information flow within a workplace but does not constitute a physical barrier in the environment itself. Each of these elements impacts workplace dynamics differently than a tangible, physical barrier like a broken elevator.