a stain in the darkness, a stain that was Jack, ..."

Question 1

and

Answer 1

Indefinite article
Repetition suggests could be more than one 
Link with Roger heightens sense of fear
Used in relation to the beastie
Cannot determine who the evil boys are

Question 2

Stain

Answer 2

Verb
Sense of permanence
Corrupting evil
Stains can spread, metaphor for pervading evil over the island/humans destroying nature
Hard to stain something dark, exacerbates Jack’s evil personality
All boys tainted once they leave

Question 3

In

Answer 3

Preposition could evoke a sense of Jack being part of the darkness
Connotations of evil/lack of hope (contrast to Ralph - who holds onto hope through the novel)
Catalyst for evil on the island

Question 4

Darkness

Answer 4

Noun
Link to fear/corruption
Jack linked to physical manifestation
Shown when boys don't vote for Jack
Everyone is capable of evil

Question 5

Evaluation

Answer 5

Jack embodies evil on the island until Roger takes over at the end
Explores dangerous and pervasive nature of evil
Jack is catalyst for evil