Answer:
You went into the woods and got me. You sat down to seek me. You brought me home with yourself because you couldn't find me. What am I?
I start new then become old. Start clean but be one dirty. I usually start big then become little.
I help boats park
I am a box which holds keys but not locks. With the right combination, I may unlock your soul. What am I?
I have a straight back and sharp teeth to cut objects.
The warmer I am the fresher I am.