Answer:
D (depressants)
Explanation:
I looked it up!
<em>"A depressant, or central depressant, is a drug that lowers neurotransmission levels, which is to depress or reduce arousal or stimulation, in various areas of the brain."</em>
Sorry if it's wrong, but I hope I helped!
Good luck!
................Microwelds
It would be A, with out water we would dry up and die, being that our body is 70 some percent of water