Is it worth it to keep the animals at the zoo and why?
In my opinion keeping wild animals at the zoo is a cruel act. These animals need freedom more than anything else. They are not just some toys or museum showpieces, they are living creatures who need their home without borders and fences. Imagine you were hold in a tiny space and hundreds of animals came to look at you, take pictures and make fun of you. You won't like it, would you? That is how they feel.
That being said, I do not encourage keeping animals at the zoo just for our pleasure, I think we must let the nature do its own thing, oherwise it will punish us.