Ethics, as defined by your text, are principles and standards of moral behavior that are accepted as right versus wrong. What does this mean exactly? How do you tell the difference between what is right and what is wrong? What ethical barometer do you use to help you decide? Ethics essentially includes doing what is right.
Thank you for the opportunity to help you with your question!
Yes you can.
Although being ethical solely depends on personal choices, One can still teach another person to be ethical by influencing them either directly or indirectly. Some people tend to perform unethical activities because of ignorance or characters related to parenthood. By educating them either formally or informally the can change and become ethical. For example, a person who has been brought up in an environment where people speak careless, insulting anyone can be trained on how to watch heir words and become respectful to others.
Just the same way unethical behaviors ended up in the person, ethical behaviors can still be transferred in to people.
Please let me know if you need any clarification. I'm always happy to answer your questions.