Why does piggy continue to support Ralph as leader?

Piggy continues to support Ralph as leader because he sees Ralph as the most sensible and rational leader among the boys on the island. Piggy recognizes Ralph's ability to make decisions based on reason and logic, which gives him confidence in Ralph's leadership. Additionally, Piggy feels a sense of security and safety when he is aligned with Ralph, as he is aware of his own vulnerabilities and relies on Ralph for protection.