The reason why ethics differs when we're talking about people, companies, nations is that all of these have interests which may differ. What happens then with differing interests is that it also lead to different moral and value systems which again in turn lead to different ethics. Most usually, the actual source why ethics differ is either due to the interests or wishes of a particular social group mentioned here.
DeviantART is a niche social networking site, it is closed and reserved. It is specifically targeted at people in the illustration and art area in hopes to allow them to socialize and share their work.
Answer:
repair tissues- protein
source of energy- carbohydrates
healthy skin- fats