Explain various teratogens to the pre-natal environment, identify what those dangers could lead to.

                                                        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.

the answer for your question is b.

with the development of the times, more and more chemical reagents or drugs (such as ox bile/bile extract powder (ox bile desiccated), dried or desiccated which contains ox bile acids. this powder is specifically been developed for pharmaceutical industry. for more information: ) for the pharmaceutical industry use, its supervision can not be ignored.