A good definition of anthropomorphism is giving human qualities to other things, whether these be gods or animals. In the case of Animal Farm, we are dealing with animals.
So, we can say that the whole book is an anthropomorphism. It plays the most important role in the book. At first the anthropomorphisms are small. The animals speak, some well, others not so well. Then the anthropomorphism becomes more significant. Some animals are able to read and they become very eloquent like Squealer. Then the animals are able to build things like windmills. Finally, in the last few pages of the book, the pigs turn into humans. In this sense, the anthropomorphism is complete. In fact, there is a bit of irony. The anthropomorphism is so complete that is it no longer an anthropomorphism, because the pigs are now humans.
George Washington decided to stay neutral when the French Revolution led to a major war between France and England
In the sentence given, it is a gerund and not an infinitive phrase. The complete gerund phrase in the sentence is "jumping rope". The gerund is the word "jumping". A gerund is a word that takes the -ing form of the verb, but functions as a noun. This gerund phrase is used as the subject of the sentence.