Answer:
Pronounced as one letter but written with three always in evil never in good and always in zebra never in animal. What is it?
I am the kind of ant that's good at math.
I am the signature stroll of ducks and penguins
I start new then become old. Start clean but become dirty. I usually start big then become little. What am I?
I am flora, not fauna. I am foliage, not trees. I am shrubbery, not grass. What am I?
No matter how little or how much you use me, you change me every month.