In my opinion, I think that should person considered an adult when he or she in 18 years old.rest of the world, considers young people capable of accepting responsibility for their actions. When you 18 years your brain is completely thinking an adult things. You can take a driver license and get a job. Most look to an age at which children can legally work, marry, vote, be drafted, or be charged with a crime, as the adult age.Other countries set minimum age requirements for child labor. The lowest exist in countries like Syria, Paraguay, or Bangladesh, where minimum age is 12. Many work in developing countries begin work prior to reaching the minimum legal age, however. Most countries set minimum age at 15-16 years old. Finally, it's good to be adult because you can do anything and no one can stop you like you parents because you are adult.