The conch symbolizes democracy within the novel for it has the power to give someone the freedom to do or say anything, like call meetings. It also symbolizes law and order and leadership.
In this scene, Piggy's specs symbolize innovation, advancement, and discovery along with reason and logic. Also, the fire represents rescue, light, security, and destruction.
"There's another thing. We can help them to find us. If a ship comes near the island they may not notice us. So we must make smoke on top of the mountain. We must make a fire."
The littleluns represent the "working class" within the story where as the older boys symbolize the ruling class. THE STRONG RULE THE WEAK
Conveys major theme in the story
The rolling of rocks from the beginning scenes within the story foreshadow Piggy's death towards the end where the conch also shatters.
The boys attack Simon because he says that the beast is a person and they believe that he is the beast so they destroy him not realizing that he is not really a beast and instead symbolizes spirituality
In the end, Piggy and Simon are now at peace while the rest of the boys are rescued and the savagery has ended.