Answer:
Why is it so easy to weigh fish?
You went into the woods and got me. You sat down to seek me. You brought me home because you couldn't find me.
I never sleep yet sometimes I weep. I can get angry or just be happy. Wherever you go, I will follow. No matter what you do, I will be there. I cannot die. What am I?
What has one head one foot and four legs?
I break down buildings, I crumble mountains but you can't see me. What am I?
No matter how little or how much you use me, you change me every month.