Piggy is very considerate of the younger boys’ feelings. He is really the only "big kid" patient enough to deal with them. When Piggy speaks to the young boys, he speaks in a kind voice and reassures them that all will be fine. He is the one who is elected to stay with the younger boys while the rest explore the island. In Chapter 2 when the boy with the mulberry birthmark is missing after the fire, Piggy is the one who shows concern and admonishes the others for their carelessness.
Piggy's actions show the reader that he is sensitive to other's feelings. He is probably this way to others because he has always been treated unkindly. His actions also represent the adult factor that is missing from the island. Piggy is the one who remains level-headed and makes the other boys think about realities they try to ignore.