Answer:
Ralph and Jack engage in a fight which neither wins before Piggy tries once more to address the tribe. Any sense of order or safety is permanently eroded when Roger, now sadistic, deliberately drops a boulder from his vantage point above, killing Piggy and shattering the conch.
I would choose the first and the fourth excerpt from the list represented above.
These lines of the first exceprt best represent the needed idea :
<span>What port received thy vessel from the main?
Or comest thou single, or attend thy train?”
And here are the lines which do the same thing :
</span><span>The rage of hunger and of thirst repress'd:
To watch the foe a trusty spy he sent:
I'm pretty sure it helps!</span>
