I think it A because Cyanobacteria absorb co2 from the atmosphere and then release oxygen To the atmosphere
I’m not sure but it’s definitely a stimulus and I think if it wants specific terms it is a Conditioned Stimulus
The web energy gain in fermentation is 2 ATP molecules<span>/glucose molecule. In both lactic acid and alcoholic fermentation, all the NADH produced in glycolysis is consumed in fermentation, so there is no web NADH production,
I hope this helped[;</span>