Answer:
I help engines spin and pants stay up. What am I?
I am heavy forward, but backward I'm not. What am I?
I am black and white and full of fuzz
I run around the streets all day. Under the bed or by the door I sit at night never alone. my tongue hangs out waiting to be fed during the day.
In wealth I abound; in water I stand; as a fencer I'm valued all over the land; at Venice I'm famous; by farmers I'm prized; respected by law yet huntsmen despised; consternation and ruin ensue when I break; And the beasts of the forest advantage won't take.
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.