Answer:
They come at night without being called and are lost in the day without being stolen. What are they?
What gets wetter as it dries?
I come out of the earth, I am sold in the market. The one who buys me cuts my tail, takes off my suit of silk, and weeps beside me when I am dead. What am I?
What has keys but no locks a space but no room and you can enter but can't go in?
I work when I play and play when I work. What am I?
What never gets any wetter no matter how hard it rains?