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.
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Scientific means that things have been tested out and proven to be accurate. There are Scientific things related to psychology because psychologists also study neurons, nerves, etc.
Behaviors are related habits, movements , speech, etc and they are all apart of the brain and that’s what psychologists study
I have no idea what I just typed but I hope it helps -,- you can just build off of it if you feel like it’s accurate
<span>Drinking very large amounts of water over a short period of time may be fatal.</span>