Answer:
The windmill symbolize in the story that D: Snowball is not adept at strategic thinking, while Napoleon is.
Step-by-step explanation:
The windmill was Snowball's idea and he wants it because it will help the farm in various ways. Snowball wanted to build the windmill to ease the animals from the burden of work. It would provide them electricity according to him. But Napoleon doesn’t think so. Both continuously debate about the windmill.
Because of his strategic thinking, Napoleon hired 9 dogs and they chased snowball out of the farm and killed him. So, In Animal Farm Snowball was labelled as a traitor. Thus, Option D is correct.