Answer:
This guy crossed a road and everyone wants an explanation.
I take off my clothes when you put on your clothes. I put on my clothes when you take off your clothes. What am I?
I regularly change shape yet remain a sphere. I am always there but not often seen. What am I?
I don't live within a house nor do I live without. Most will use me when they come in and again when they go out.
I am flora, not fauna. I am foliage, not trees. I am shrubbery, not grass. What am I?
I cannot be burned in fire or drowned in water. What am I?