Answer:
In the evening I'm long, in the morning I'm smallอพ When seen in a ballroom, I'm nothing at all.
Some live in me, some live on. And some shave me to stride upon. I rarely leave my native land. Until my death I always stand. High and low I may be found. Both above and below ground.
I cannot be felt, seen or touched. Yet I can be found in everybody. My existence is always in debate. Yet I have my own style of music.
A muttered rumble was heard from the pen, and I, in my walking stopped to look in. What was this I saw? A massive beast, hoofed, and jawed. With spikes upon its mighty brow, I watched as he struck the turf and prowled. And yet for all of his magnificence, he couldn't get out of that wooden fence.
To cross the water I'm the way, for water I'm above. I touch it not and, truth to say, I neither swim nor move.
If itโs information you seek, come and see me. If itโs pairs of letters you need, I have consecutively three. What am I?