What change can be seen in piggy when he angrily fights Ralph in the water instead of retiring meekly?

In that scene, Piggy displays a sudden assertiveness and defiance towards Ralph, marking a shift in his character from passive and submissive to more assertive and willing to stand up for himself. This change can be interpreted as a response to the growing tension and fear on the island, prompting Piggy to assert his own presence and voice.