Final answer:
Napoleon reacts with enthusiasm and approves of the plan, using it to consolidate his power and manipulate the animals in the novel Animal Farm.
Step-by-step explanation:
When the animals agree to build the windmill in the novel, Animal Farm, Napoleon reacts with enthusiasm and approves of the plan. He sees the windmill as a way to consolidate his power and further control the animals. He takes credit for the idea and manipulates the animals into working hard to build it, exploiting their trust and loyalty.
Napoleon's reaction is in line with his character as a manipulative and power-hungry leader. He uses the windmill project to solidify his control over the farm and exploit the labor of the other animals for his own benefit.
This event is significant in the novel as it marks a turning point where Napoleon's dictatorship becomes more pronounced and the animals begin to lose their original vision of a fair and equal society.