What is the difference between ecosystem and biosphere?

Ecosystem: When species interact with each other Biosphere: All living things.

Ecosystem is the physical system(an open system) in which the mutual interaction between biotic and aboitic component motored by the energy component is studied while the Ecology is the science which study the interrelation between Aboitic(inorganic) and Biotic(organic) components as well as the interaction among the biotic component to make it more clear, ecosystem is the fundamental unit of ecological study.

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.