Ralph has come across balanced rocks twice now (25-26 and 105-107). How does his changing reaction help to develop the plot? (Lord of the Flies)

we need more information in order to answer.

to convince americans of the importance of others.

i believe it is the first choice (1.)

because the major theme is(“both the wild and civilization have rules.”)

and also as u said,( based on what buck learns within the call of the wild, "both the wild and civilization have rules".this is true of humans within society as well.