<span>come between so as to prevent or alter a result or course of events</span>
Ok so please don't completely trust my answer as i might not know what im talking about.
Piggy's death in TLOTF as well as the destruction of the conch is hugely significant as it symbolizes the death of a voice of reason. Throughout the book piggy took the practical side to things. Often siting the most logical ways and solutions to problems while the conch acted as a cornerstone of control. It was there to keep order and reason.
The answer is D.
17 is B(plot)
18 is i think D.
20 is meter
21. is D.
23 idk if this is right but i think it is c
and 24 is author purpose.
i hoped this helped