Final answer:
In William Golding's 'Lord of the Flies, Rodger throws rocks at Piggy, revealing the growing violence among the boys.
Step-by-step explanation:
The question refers to an act committed by a character named Rodger in William Golding's novel, Lord of the Flies. When Rodger throws rocks, he aims them at Piggy. This event is significant as it highlights the increasing levels of aggression and the breakdown of societal norms among the boys stranded on the island. The correct answer to the question is b) Piggy.