Why do the boys dance and chant in chapter 9 in lord of the flies?

In Chapter 9 of "Lord of the Flies," the boys dance and chant as they reenact the killing of a pig. This ritualistic behavior symbolizes their descent into savagery and their deepening connection to the violent and primal instincts within themselves. It also serves as a way for them to maintain a sense of power and control on the island, reflecting the breakdown of civilized behavior and the rise of barbarism.