Answer:
If you happen to wake up at dawn, you'll probably find this covering the lawn.
What does a stone become when in the water?
Man's most important invention.
It comes only before, it comes only after. Rises only in darkness, but rises only in light. It is always the same, but is yet always different.
What loses its head every morning only to get it back every night?
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?