Answer:
My first two letters say my name. My last letter asks a question. What I embrace I destroy.
What has roots that nobody sees and is taller than trees. Up up up it goes and yet never grows?
You use a knife to slice my head but you weep beside me when I am dead
I run up and down the stairs without moving
I am the beginning of eternity the end of time and space the beginning of every end the end of every place.
Runs over fields and woods all day. Under the bed at night sits not alone, With long tongue hanging out, Resting at your feet until we go for a walk