Poor people have it. Rich people need it. If you eat it you die. What is it?

You do this into someone's ear when you want to be discreet.

You can tumble in it, Roll in it, Burn it, Animals eat it, Used to cover floors, Still used beyond stall doors. Freshens whatever it is placed on, Absorbs whatever is poured into it. What is it?

Without this, H2O would just be 2O

Why is 6 afraid of 7?