Orwell's characterization of Mr. Pilkington supports his purpose by illustrating the complexities of human-animal relations in the context of the political allegory of the story. The best answer among the options provided is:
Orwell draws parallels between Mr. Pilkington and leaders of countries who overlooked Stalin's poor treatment of his people.
This option captures the essence of Orwell's critique of political figures who, despite the oppressive regimes and poor conditions experienced by the populace (in this case, the animals on Animal Farm), are willing to overlook these realities to maintain diplomatic relations or benefit politically and economically. Mr. Pilkington's speech reflects a willingness to accept and support the pigs' leadership, despite the underlying issues, paralleling historical relationships where political leaders turn a blind eye to injustices for their own gain.