In july 1975,the us government started to focus on child maltreatment as a component a.) criminal justice b.) juvenile justice c.) child welfare d.) social welfare

I think the answer is either C or D I'm not too sure though.

                                                        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.

b) the heart is a pump made of muscle and that is difficult to grow in the lab.