Final answer:
The sentence "As yet no animal has actually retired on pension" is an example of foreshadowing in Animal Farm, implying that the animals will not have a peaceful retirement.
Step-by-step explanation:
The sentence "As yet no animal has actually retired on pension" is an example of foreshadowing in the novel Animal Farm. Foreshadowing is a literary technique where the author gives hints or clues about future events in the story. In this sentence, it suggests that the animals in Animal Farm will not have a peaceful retirement and that their labor will continue even when they are old or unfit to work.