While we are still children most of us live at home with our parents.
more or less peacefully , but as we become teenagers,things change , and we begin to grow apart from our parents. We are a new generation that's almost ready to be independent , to leave the home where we grew up and make a new home of our own.
all human begins must do this , but they do not all do it in the same way. Suppose for instance you belonged to a primitive tribe, then as you grew up you would learn the skills you needed as an adult - How to hunt or fish , how to keep house and look after children. You would be ready to marry in your early teens and you would settle down nearly your family in the village you know.