Answer:
I am a seed with three letters in my name. Take away the last two and I still sound the same.
Open me, and you can't see me without a mirror. Close me and you can't see me at all. What am I?
I have cities with no people forests with no trees and oceans with no water.
In buckles or lace, I help set the pace. The farther you go, the thinner I grow. What am I?
There are four of us but it seems like everyone loves spades the most.
No matter how little or how much you use me, you change me every month.