Final answer:
In 'Animal Farm' by George Orwell, Snowball and Napoleon use pigeons to inform other animals of their rebellion.
Step-by-step explanation:
In George Orwell's allegorical novel Animal Farm, Snowball and Napoleon send out flights of pigeons to inform other animals of the rebellion. The pigeons' role is to spread the news of the rebellion happening at Manor Farm to neighboring farms with the hope that those animals would also rise up against their human oppressors, replicating the rebellion initiated by the animals on Manor Farm.