Ok I am very confused, What does this mean- There is to much trampled tarain..

First, if you know how to, press the button which makes all of the plants disappear from sight. It does not matter if you do or do not, it will just make it easier. Now take your terrain brush, and scroll through the exhibit, and you will find a square that says "trampled terrain". Fix it back to whatever used to be there. For example, in a lion exhibit, you would usually change it back to savanna grass. It is a little complicated, but you'll figure it out. By the way, trampled terrain means that the animal(s) have been on the square a lot.