Final answer:
Quid pro quo sexual harassment occurs when a supervisor offers a work-related reward in exchange for a sexual favor, which is illegal and unethical, creating a hostile work environment.
Step-by-step explanation:
When a supervisor offers a work-related reward in exchange for a sexual favor, this behavior is known as quid pro quo sexual harassment. It is illegal and unethical, and it violates equal opportunity laws and workplace policies. This form of harassment creates a hostile work environment and can be reported to human resources or higher authorities within an organization. Victims of quid pro quo sexual harassment are often entitled to protection under the law and may seek legal action against their harassers and the organizations that enable such conduct.