How did hazel die in Watership Down?

In Richard Adams' "Watership Down," Hazel does not die within the main narrative of the story. Instead, he peacefully passes away in the afterlife at the end of the novel. Hazel finds himself in a serene place where he is reunited with his fellow rabbits, particularly El-Ahrairah, symbolizing a tranquil conclusion to his journey. This moment reflects the themes of life, death, and the continuation of the spirit in the world of the rabbits.