This question is based on Literary Appreciation... - JAMB Literature 2002 Question

This question is based on Literary Appreciation
'But there was a stillness about Ralph as he sat that marked him out: there was his size and attractive appearance; and most obscurely, yet powerfully, there was the conch. The being that had blown that, had sat waiting for them on the platform with the delicate thing balanced on his knees, was set apart. '
Golding, Lord of the Flies.
In the passage above, the conch symbolises