Final answer:
The process of brewing starts with photosynthesis and ends with fermentation. During brewing, sunlight facilitates photosynthesis in plants, which are then fermented by yeast to produce ethanol, commonly found in beer.
Step-by-step explanation:
The process of brewing starts with the sun providing energy for photosynthesis, which is the process by which plants convert sunlight into chemical energy. The label that goes after 'Sun' and before 'Plant' is C: photosynthesis.
After the plant, specifically the cereal grains like barley or wheat, have been harvested and processed, they undergo fermentation by yeast. The correct sequence is Sun photosynthesis --> Plant --> fermentation Yeast --> ethanol (beer). So, the label after 'Plant' and before 'Yeast' is D: fermentation.
Fermentation here refers to alcoholic fermentation, where yeast cells convert sugars such as glucose into ethanol and carbon dioxide CO₂. The label E: CHO production is not relevant to this process. This process of fermentation is anaerobic, which means it occurs in the absence of oxygen. The balanced chemical reaction for the fermentation of glucose during the brewing of beer is C₆H₁₂O₆ --> 2C₂H₅OH + 2CO₂.