The answer in the space provided is violent situations. When failing mandatory arrest and the intervening of situations like violent matters, it could led to creation of specialized courts. Where they are the ones to handle things like these where other people couldn't.
I would say trains, airplanes, cars, and list some more inventions that were made long time ago.
hope that this helps you. =)
Helps improve the mental health of the other person. It improves extending the thinking and opens the mind
