Question

What are the similes and metaphors used in chapter 3 lord of the flies

Answer 1

While I do not have the book and cannot give specifics

for similes, look for anything comparing two things with like or as
(he ran"like" a giraffe on stilts)
( she was "as" round as a balloon)

for metaphor it compares without like or as
( the girl was a cat sneaking up on her prey)