Answer:
To prevent Jack from becoming the leader and convince boys to follow order and stop believing in beast story of Jack.
Jack asks his tribe to dance to get protection from the beast in the storm.
The chanting boys do not recognize Simon and consider him the beast as his behavior is frenzy. When Simon arrived, boys were in escatic state and dancing.
This removed the prove that beast doesn't exist.
Step-by-step explanation:
Lord of the Flies is a novel written William Golding. This novel is about survival story of group of boys stranded in an isolated island.