Answer:
I am a shimmering field that reaches far. Yet I have no tracks and am crossed without paths. What am I?
I'm written with two letters, said with one and seen with two. What am I?
If you've got me I'm everywhere. If you share me I'm nowhere. What am I?
I am flora, not fauna. I am foliage, not trees. I am shrubbery, not grass. What am I?
What is always in front of you but can't be seen?
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.