The correct answer to this open question is the following.
Although there are no options attached we can say the following.
The significance of studying different wordings on the term ethics is the following.
As Ethics has to deal with the morals of the human being, it is positive to look for different definitions, authors, and explanations about the meaning of the word Ethics, including some examples to better understand the term. The more definitions we find about Ethics, the better the chance to better comprehend the term and its scope.
So different wordings means also different perspectives and approaches to explain and comprehend what is Ethics, and why it is an important philosophical subject to understand human behavior under different circumstances. Ethics can be better understood using proper sources and not merely as the discipline dealing with what is good or bad, right or wrong in human conduct.
