d. Napoleon wants to control all aspects of the farm and sees Snowball’s idea as a threat.
Explanation:
Snowball's idea of building a windmill is far-sighted in nature which would decrease hard labor in the future. On the other hand, Napoleon wants to procure food to prevent food scarcity. While two of them have a contradictory viewpoint, the reasons were more in-depth. Napoleon wants absolute power and could not have left labor free to think about his vision of acquiring power.
