Ultrasounds are procedures that use sound waves to provide images of organs or blood inside the body. As sound passes through the body it provides echoes that can display distance, size and shape of inside organs.
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.