Final answer:
The tragic irony of Boxer's life and death in 'Animal Farm' is that despite his unwavering loyalty and hard work as an Animalist, he is sold for glue in the end, exemplifying betrayal in a totalitarian regime. The correct answer is option d).
Step-by-step explanation:
The terrible irony in Boxer's life and death in the novel 'Animal Farm' represents the idea that even though Boxer is the best example of an Animalist, working hard and living by the maxim 'I will work harder' and 'Napoleon is always right', he receives a tragic betrayal in the end. The correct answer to the question is (d): Boxer is the best example of an Animalist, yet when he can no longer work, he is sold for glue rather than rewarded. This depicts the harsh realities of totalitarian systems, where loyalty and hard work are exploited until they are no longer useful, at which point even the most faithful and industrious are discarded.