Answer:
They're up near the sky, on something very tall. Sometimes they die, only then do they fall.
The moon is my father. The sea is my mother. I have a million brothers. I die when I reach land.
Some try to hide, some try to cheat. But time will show, we always will meet. Try as you might, to guess my name. I promise you'll know, when you I do claim.
Twigs and spheres and poles and plates. Join and bind to reason make.
Goes over all the hills and hollows. Bites hard, but never swallows.
I repeat only the last word you say. The more I repeat, the softer I got. I cannot be seen but can be heard. What am I?