Baby Camel: Mum, why do we have such a huge…

Baby Camel: Mum, why do we have such a huge hump?
Mum Camel: They’re for storing fat out in the desert.

Baby Camel: Why do we have hooves, then?
Mum Camel: So our feet don’t sink into the hot sand.

A moment later…

Baby Camel: Right. So why do we have all this stuff if we live in the London Zoo?