The plane they were flying in was shot down, making it crash into a tropical jungle which caused the boys to be where they are.
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Explanation:</u></h3>
A group of school boys were being evacuated from an ugly war in Britain. They were being evacuated by an airplane. While the plane was in air, it was shot down and it crash landed the middle of a tropical forest. According to the text, as the plane crashed, it left a 'scar' on the ground of the forest.
After they crash landed, the boys on the plane were stranded. The boys assemble after one of the boys, Ralph, uses a conch shell to call out other boys. The boys make Ralph their leader who further instructs the boys to hunt for food. Furthermore, he asks boys to make prepare a fire to signal any passing planes and ships. But the boys were more into enjoying their time without the grown ups until they let a large portion of the forest catch fire, which presumably kills a boy. Circumstances make the boys transition from innocent to savage and bloodthirsty children desperate to survive.