The use of robots and how they help build cars and how the assembly line has improved from the 1900's would be my answer.
They are ethical issues.
This means creating a system that would identify right or wrong. Today there are many opinions that are very
divisive on several issues such as abortion, aids, capital punishment,
etc. Making the right decision requires
intensely crafting laws or policies that would satisfy these dissenting voices.
I believe that would be the Twenty Sixth Amendment.
The answer should be 3, or do you need to know the 3?
Any law that uplifts human personality is just. Any law that degrades any human personality is is unjust. Segregation is politically, economically, and sociologically unsound, but it is morally wrong