Answer:
It's what light turns into in the night
What comes in many varieties and can't be seen or touched, but it often makes you move?
MT_TF_S What are the missing letters? Why?
What cannot talk but will always reply when spoken to?
What has roots that nobody sees, and is taller than trees. Up, up it goes, and yet it never grows.
I touch the Earth, I touch the sky, but if I touch you, you’ll likely die. What am I?