Answer:
Blade to blade I always win My foe laid low and even. Yard by yard through thick and thin I'm busiest in season.
Who keeps the ocean clean?
What is always coming but never arrives?
What force and strength cannot get through, I with my unique teeth can do. What am I?
My geometry is lost in the night to be found in daylight's break. The rigors of time have torn me to shreds, yet I stand to protect that which lies within. What am I?
What did the piece of wood say when he saw the screwdriver and screws approaching?