An example of commensalism?

1) A squirrel in an oak tree because the get a place to live and is provided with food while the tree remains unharmed 2) Deer and a shrub because a deer get nutrients and food and a place to live and the shrub is unharmed (unless he eats all of it) And im still looking for a third reason for my science homework.

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.