Answer:
I do not contain flesh feather or scales; yet I have fingers and thumbs.
I am flora, not fauna. I am foliage, not trees. I am shrubbery, not grass. What am I?
With three eyes and as black as night I frequently knock down ten men with a single strike!
People buy me to eat but never eat me. What am I?
I am a food with 5 letters. If you remove the first letter I am a form of energy. Remove two and I'm needed to live. Scramble the last 3 and you can drink me down.
No matter how little or how much you use me, you change me every month.