Why wouldn't you find a fossil in a igneous rock?

Most fossils are preserved plant or animal bodies living in or near water. There are no animals or plants which can live in molten magma so you will never find them in cooled magma, which is an igneous rock. There are however, exceptions where a lava flow covers a tree.

The tree is burnt but the impression of it remains in the rock.

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.