Answer:
In "Lord of the Flies" by William Golding, the lagoon serves as a symbol of both safety and danger. Initially, it represents safety and tranquility, as it's a calm and peaceful area where the boys swim and play. However, as the story progresses and the boys' behavior becomes more savage, the lagoon also becomes a place of danger, especially during Simon's tragic death scene, where the once serene setting becomes ominous and threatening. Thus, the lagoon symbolizes the duality of human nature and the descent into savagery.