That they are the master of evil.
Yes it is becase a Metaphor is The use of a word or phrase to refer to something that it is not, invoking a direct similarity between the word or phrase used and the thing described (but in the case of English without the words like or as, which would imply a simile); the word or phrase used in this way; an implied comparison.
She belonged in a place where it was warm were it would be peaceful and not cold and noisy
It is saying how zoos can be like the natural world
