Answer:
Each morning I appear to lie at your feet, all day I follow no matter how fast you run. Yet I nearly perish in the midday sun.
Many foods can make me strong but give me water and I won't last long.
A twiggy home
What comes down but never back goes up?
In many hallways you would stand, if not with this in hand.
I am a room that has a roof but no walls. What am I?