In Animal Farm, Boxer represents D. the proletariat.
Explanation: Animal Farm is a satirical novel written by George Orwell. The characters of this novel represent different individuals that took part in the Russian Revolution. In that way, Napoleon represents Joseph Stalin, Snowball represents Leon Trotsky and Boxer serves as an allegory for the proletariat in Russia. In Animal Farm, Boxer is a innocent and hard-working horse who follows each of Napoleon's orders without even questioning them. In other words, Boxer highlights the importance of working hard and believes in everything that Napoleon says.