How do you increase exhibit popularity in zoo tycoon complete collection?

There are multiple things you have to do in order to raise the animals exhibit rating to at least a 90. they are listed below.

1.) do all the things in the animals want list (the zoo keeper icon) and make sure you don't over do it, or under do it.

2.) make sure the foliage you've placed is a majority of what the animals favorite vegetation is (its the picture of a plant or tree along with the continent when you click on the animal icon in the purchase section

3.) have multiple forms of vegetation in the exhibit, but leave the middle and front viewing area free for visitors to see.

4.) make sure all elevations are ok (raise them until the animal has a red frowny face, then lower it once and it'll smile.)

5.) create patches of terrain in the enclosure, not just big blotches

Hope this helped!