Answer:
Piggy tells Ralph to blow the conch, as loud as he can.
Step-by-step explanation:
In this moment in the story Piggy does not have his glasses and is worried, since he cannot do much without them. He asks Ralph to blow the torch in order to signal boys to come to them, even though most of them have gone over to Jack's side.
In the end it is decided that the boys who came will go to Jack in order to retrieve Piggy's glasses.