In this passage from Animal Farm, Orwell employs satire primarily through parody to imitate communist propaganda techniques. The enthusiastic reaction of the animals to Old Major's song, "Beasts of England," reflects the way propaganda can stir emotions and unify individuals under a common cause. This tactic is reminiscent of how political movements often harness music and slogans to incite excitement and allegiance among followers. The description of diverse animals contributing their sounds to the singing suggests a collective spirit and shared purpose, effectively mirroring how propaganda aims to rally support for a revolutionary ideology.
While elements like exaggeration and ridicule are present in the broader context of the novel, the most salient use of satire in this particular passage is through the parody of the way revolutionary songs function in rallying support and shaping ideology.