Animal Farm is an allegory in which the characters and events represent the Russian Revolution early in the 20th century. The plot to Animal Farm can be broken down as follows:
Introduction: The reader finds out that the revered pig Old Major has had a vision in which he sees the future liberation of animals. He teaches the animals a song called “Beasts of England,” which is meant to inspire them to revolt against man.
Rising Action: The animals successfully revolt and create a system called animalism. The pig Napoleon gains control of the farm and becomes a dictator. The animals, except for the ruling pigs, are no better off than they were under the humans.
Climax: The pigs become so much like humans that they actually begin walking upright.
Falling Action: Other animals from farms which have also successfully revolted arrive at Animal Farm.
Resolution: To the animals looking in the house from outside, the pigs and humans begin to appear physically alike.
It should be noted that parts of plot are open to a degree of interpretation. The climax is the moment of highest emotional involvement for the audience. It’s possible that people could disagree on what the climax is, which would cause them to disagree on what the other parts of plot are for that particular work.