Nichrome, without a doubt. It is a high resistance, which causes current to generate much heat. It is used commercially in many heating elements due to this property, like toasters, ovens, stoves, waffle irons, hair dryers, you name it.
Nichrome is a resistor, it stops the flow of electrons which generates heat.
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.