Because the Iterator interface has a method called remove() which you must implement in order to say that you have implemented the Iterator interface.
You must implement remove because it is part of the contract defined by the Iterator interface.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.