What are organisms that can't make their own food but feed on other organisms called?

Anything other than an autotroph. Autotrophs are able to directly use the source of energy, either by complex chemical reactions or photosynthesis. Herbivores and carnivores are heterotrophs, and must obtain organic carbon by breaking down complex organic compounds, by means of eating and digesting.

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.