A transducer (camera) used with water-based gel gives off sound waves that enter the body and bounce back into the machine to create a picture. 2D is a 2-dimensional black and white image. (Standard medical ultrasound image) 3D is a 3-dimensional image that has different color hues that give a lifelike picture allowing you to see what your unborn baby will actually look like and 4D is simply 3D with motion.
You will be able to experience movements like kicking, yawning or even waving in real time! More.
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.