The appropriate response is glycolysis. It is an anaerobic procedure. Amid glycolysis, glucose is changed over to pyruvate so as to frame ATP from ADP. This procedure is basic in cell breath and maturation however after this system, the absence of oxygen causes aging rather than the pyruvate particles getting to be noticeably required with the Krebs cycle.
The condensation of water vapor formed the early oceans. It is an important part of the water cycle. It is easy to eliminate the other answers in this question. It can't be meteorites, living organisms, or nitrogen.