What is this?
It is the desert.
Is this a river?
No, It isn't. It is a waterfall.
What is this?
It is the ocean
Is it a forest?
No, It isn't. It is a lake.
What is this?
Forest
What is this?
It is a river.
What is this?
It is a volcano.
Is this a volcano?
No it isn't. It is a mountain