Which of the following is an example of prohibited harassment in the workplace?

Unwelcome sexual advances are a clear example of prohibited harassment in the workplace. This behavior involves making advances or engaging in conduct of a sexual nature that the recipient finds objectionable or unwanted. Such actions create a hostile work environment and violate laws aimed at preventing sexual harassment, thereby infringing on the rights of employees to work in a safe and respectful atmosphere.

Addressing the other options, negative performance reviews may be a function of legitimate managerial evaluation, provided they are based on objective criteria and not discriminatory biases. Workplace gossip can contribute to a toxic environment but is typically more about unsanctioned sharing of information rather than direct harassment unless it is severe or targeted. Constructive feedback is essential for employee growth and is generally welcomed as part of professional development unless delivered inappropriately or disparagingly, in which case it could veer into harassment territory. However, constructive feedback itself is not considered harassment when conducted appropriately.