What is a active voice and a passive voice?

The active voice describes a sentence where the subject performs the action stated by the verb. It follows a clear subject + verb + object construct that's easy to read. In fact, sentences constructed in the active voice add impact to your writing. With passive voice, the subject is acted upon by the verb.

Explanation:

the correct answer is the first option "the bolkshevik revolution". the passage makes reference to many of important events that occured in the revolution, such as the assemblies, in this case the animals are gathered in an assembly after a protest, the murder of fellow partners, the speeches given by the leader of the revolution, among other aspects. the last choice is possible, but in this passage in particular it is not emphasized the fight between the characters, that is the two pigs, that represent lenin and stallin.