Answer:
I am heavy forward but backward I am not. What am I?
I run through hills. I veer around mountains. I leap over rivers. And crawl through the forests. Step out your door to find me.
There is one in a minute two in a moment and none in a thousand years. What is it?
Man walks over, man walks under, in times of war he burns asunder. What is it?
If two is company and three is a crowd, what is four and five?
Give it food and it will live, give it water and it will die.