Scientists believe that the earth's early atmosphere lacked gas because photosynthetic organisms did not yet exist

The right answer is C. Oxygen

During photosynthesis, there is consumption of carbon dioxide and water to produce glucose and dioxygen. Glucose is the "fuel" of its growth. Cellular respiration will consume some of this glucose and oxygen to form oxygen and water.

So, if the atmosphere was lacking oxygen, it's simply because there was no photosynthesis producing oxygen.

hiebcwsnjd.midjuseehsidbgaswnjid jidgxseenj f judawdnu.jidfssesnj fjidhtsesni hxssxno zccsexjivzcz

the transfer of energy between two molecules spaced just nanometers apart plays a key role in many technologies, including photovoltaics, quantum information systems, lighting, and sensors, as well as in biophysics to measure nanometer distances and in photosynthesis. but an open question in this area is what effect, if any, the surrounding photonic environment has on this nanoscale energy transfer. by designing and performing a carefully controlled experiment to answer this question, scientists have settled the debate and found clues to improving the efficiency of many of the technologies that rely on this process.

explanation: