What Was The "Forbidden Fruit"?

Was it an apple like the bible says or was it meat?

Charles Dickens had one of his characters, I believe, in Oliver Twist, say, " Don't give meat to children, it makes them aggressive and mean." In the animal world meat-eaters are cunning and aggressive. Sometimes too aggressive for their own good. They end up dead because they exceeded their limitations. In the animal world plant-eaters use memory as their best defense. They are less likely to exceed their limitations. So there are more of them.