A serious question

The little camel asks his mother:
Mum why do we have these big humps?
Because in these hump there is some water and in the hot desert we can drink.
And mum. Why do we have this large fur?
Because the dessert at night is so cold and then we don’t feel cold.
And mum. Why do we got these big hoofs.
Because the desert the sand is hot and the hoofs save us from the hot sand.
But mum. What we are we doing here in the national zoo?