Answer:
The theoretical study of morality (likened to a theoretical study of physics)
Step-by-step explanation:
Ethics is set of moral standards that people use to govern their behavior. Ethics are influenced by the culture & Life experience that a person learn throughout his/her life. Because of this, ethical standards that is held by one person could be extremely different compared to the standards held by another person.
Research about ethics is a bit complicated. Unlike STEM subjects, Ethics do not have anything that researchers can use as objective & Countable variables. This is why studies about ethics are mostly considered as theoretical.