Question!

Rattlesnakes... I dont think that is it...Is it water?

salt as well... salt before properly processed is a very deadly substance... atleast tha'ts what i remember hearing when i was younger.

coffee...

Energy,sad to say!

i agree with JeenYuss....there is a lot more than one.

water-you can drown
fire-you can burn
shelters-they can collapse
food-you can choke
companions-they can murder

i will quote a thing i saw in someones sig, but cant remember whos. its somewhat like "life is a terminal sexually transmited disease"...

cannabis?

the government