Is collecting seeds or berries to grow plants "depriving" other animals of food?

Yes, it is. However by using those seeds or berries to propagate new plants you are increasing the amount of food will be available to them in the future. One squirrel may skip a snack if you take a black walnut away from him, but a number of them will have a big feast if you plant that walnut to grow a new tree.

Squirrels deprive each other of food the same way when they bury their nuts, thereby planting the seeds that grow into trees. 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.