Sheila was in a terrible accident six months ago that left her best friend paralyzed. she still is startled by the slightest sudden noise and suffers from sleeplessness, nightmares, and numbness. she has trouble concentrating on anything for a long time and has stopped hanging out with her friends.

                                                        water

a colorless, transparent, odorless, tasteless liquid that forms the seas, lakes, rivers, and rain and is the basis of the fluids of living organisms.

                                                        halon  

any of a number of unreactive gaseous compounds of carbon with bromine and other halogens, used in fire extinguishers, but now known to damage the ozone layer.

                                                  dry chemical

extinguishing agent used on class a, class b, and class c fires.

                                                  carbon dioxide

a colorless, odorless gas produced by burning carbon and organic compounds and by respiration. it is naturally present in air (about 0.03 percent) and is absorbed by plants in photosynthesis.

i like you as a

explanation: