What do most people need at least a little of every few days to survive?
NACL UV mL oxygen corn H20 rest Hydrogen
A B C D E F G H
Water is everywhere H20.
Most people can only survive a few days without H20.
What do most people need at least a little of every few days to survive? (A) NACL (B) UV (C) mL (D) oxygen (E) corn (F) H20 (G) rest (H) Hydrogen