Answer:
I run through hills. I veer around mountains. I leap over rivers. And crawl through the forests. Step out your door to find me.
Walk on the living, they don't even mumble. Walk on the dead, they mutter and grumble.
It is a sound of empty, speak and it'll talk back plenty. But all the more you yack, you'll get the same words back.
My life can be measured in hours, I serve by being devoured. Thin, I am quick. Fat, I am slow. Wind is my foe.
When can someone truthfully tell someone “well done” but think they did a bad job?
When is it bad luck to see a black cat?
Difficult
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?