Ruth has weighed 130 pounds all her adult life. during her pregnancy, she gained 25 pounds. after having her baby, ruth’s weight returned naturally to 130 pounds. for ruth, 130 pounds is a(n) and her body went back to it through the process of

For her body 135 is a set point and she returned to it thru homostasis

Explanation:

                                                        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.