Final answer:
Old Major addresses the animals as 'comrades'. This term is used to create a sense of unity and equality among the animals.
Step-by-step explanation:
In George Orwell's novel Animal Farm, Old Major addresses the animals as 'comrades'. This term is used to create a sense of unity and equality among the animals, suggesting that they are all in this struggle together. By addressing them as comrades, Old Major is emphasizing the importance of solidarity and cooperation in their fight against human oppression.