In the first chapter, what do the "creepers" symbolize?Lord of the Flies by William Golding

Since the vine-like plants encompass the entire island and
impede the progress of the boys as they explore the pink granite mountain on the
island, they may possibly be symbolic of the difficulties that the boys will experience
now that they are without adults and must fend for themselves.  Like the extending
vines, the conflicts that will develop among the boys may lead to a spiritual
descent that will later, like the creepers, encompass the island and impede the
existence of order and civilized behavior.

That the feral
pig is discovered and entangled in these creepers is further indication of the evil
import of these entangling vines.  For, others may easily become entangled in pervasive
evil and savage ways as their absence from civilization extends in the continuing
narrative of William Golding's Lord of the
Flies.