Answer:
Goes over all the hills and hollows, Bites hard, but never swallows.
I am flora, not fauna. I am foliage, not trees. I am shrubbery, not grass. What am I?
What is black when you buy it, red when you use it, and gray when you throw it away?
I can be in your body but never on your placemat. I'm always better when I'm fresh, but you'll never see me in the flesh. What am I?
I am the place to turn when nature calls.
When is it bad luck to see a black cat?