Andreas wrote the following hypothesis: "If the number of livestock on Earth increases, then the amount of methane gas in the atmosphere will increase because cows produce methane gas as a by-product of digestion.”

What scientific question is his hypothesis most likely addressing?

Ibelieve the answer is b

The answer is water molecules are split.cellular respiration and photosynthesis are complement  reactions to each other. these are reverse reactions. in cellular respiration glucose and oxygen yield water and carbon dioxide. so, when respiration begins,  glucose molecules are split. in the opposite reaction - in photosynthesis, carbon dioxide and water yield glucose and oxygen. thus,  when respiration begins, water molecules are split.