Soil is the principal medium in which most plant life grows, so the fundamental composition of the soil medium will directly effect the rate and size of a plant and its flowers. Microbial bacteria within the soil will also effect a plants growth there are many factors which will effect a plants growth and the ones I have mentioned are not the only ones.
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.