Answer:
I run smoother than any rhyme, I love to fall but cannot climb. What am I?
With pointed fangs I sit and wait; with piercing force I crunch out fate; grabbing victims, proclaiming might; physically joining with a single bite. What am I?
What has a face and two hands but no arms or legs?
My first is high my second damp my whole a tie a writer's cramp.
I am all around you, but you cannot see me. I have no throat, but you can hear me. Valued during summer but despised in the winter. What am I?
No matter how little or how much you use me, you change me every month.