Isaac is in a relationship with nera. they are respectful of each other and have set healthy boundaries that they are both comfortable with. isaac is very attached to nera. he has begun to neglect his friends and only be with nera. nera is also very attached to isaac, but frequently hangs out with her own friends. which phrase in this description reflects a potentially unhealthy behavior that could lead to a dangerous dating situation?

                                                        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.

alzheimer's disease is a brain disease where you forget things that happened moments, even seconds before hand. reward me plz