In philosophy the study of ethics is A study of human knowledge
The theoretical study of morality (likened to a theoretical study
of physics)
The theoretical study of the soul
A study of language and its usefulness
None of the above

The theoretical study of morality (likened to a theoretical study of physics)

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.

using the scientific method.

disorders of the brain include both behavior disorders and other psychiatric illnesses. the primary difference between a behavior disorder and another type of psychiatric disorder is the presence of choice. psychiatric conditions are considered to be involuntary while in behavior disorders, choices are essential.