I'm messing up my deserts. That's a shame. But deserts are definitely going to be something easy to write about. Write about how they separate African cultures and that they don't allow for trade and they allow for more tribalism and isolationism and that's not always a great thing. But they also protect you from invasion. So that's a lot of geography for you. I hope that you got some examples and especially, I'm telling you, here's the essay.