answer:Animals in zoos are aware of their inability to leave the premises. And the more intelligent animals are certainly cognizant of both their imprisonment and all the humans watching them. It’s one reason primates in zoos are almost belligerent. There was a tiger at the Oakland Zoo one time when I was there, in a model enclosure – high walls he couldn’t climb out of, a lot of open space, and plenty of room. But the tiger was still displaying a lot of stress behavior, pacing back and forth in a small area. And humans would feel the same restriction to liberty. It would only work as a zoo for humans if the whole world was an exhibit with some superior being watching us and observing us. But if that’s the case they’re doing a lousy job. A caring powerful zookeeper would stop all the fighting and population growth and pollution.