Final answer:
Ethical issues can occur at the individual, organizational, and societal levels.
Step-by-step explanation:
The three levels on which ethical issues can occur are the individual level, organizational level, and societal level. At the individual level, ethical issues pertain to personal choices and actions that may be morally right or wrong. At the organizational level, ethical issues are related to the practices, policies, and responsibilities of a specific company or institution. Lastly, at the societal level, ethical issues encompass broader concerns that affect society as a whole.