It's a type of fossil specifically called a 'Cast.'
To promote the growth of vegetation, Aborigines from Australia created grass fires to encourage new growth in vegetation and to allow the wild animals to eat the new plants resulting from the grass fire. They also used grass fires in order to roast some seeds that germinate only when burned. In return, these seeds provide them food.
I would have to say (C) Both countries are former colonies of France. GOOD LUCK!
