Answer:
fermenting plant material to create ethanol
Explanation:
Fermentation is the process in which plant material is breakdown under anaerobic condition.
Fermenting plant material will be the greatest short-term profit for the farmer in the given scenario because plant material is already present and fermentation is a quick chemical process with less cost.
While other processes given that is planting and harvesting and wind turbines are long term processes.
Answer: The answer is installing wind turbines and selling the excess energy
Explanation: I got it right on Edge!!!!! Hope this helps