What are some religious connotations in Golding's Lord of the Flies?

As one of his first acts as elected leader, Ralph proclaims the need for a fire:

“There’s another thing. We can help them to find us. If a ship comes near the island they may not notice us. So we must make smoke on top of the mountain. We must make a fire...

...We’ve got to have special people for looking after the fire. Any day there may be a ship out there and if we have a signal going they’ll come and take us off."

The most obvious and pervasive reference to religion on the island is the fire. The fire, like religion, represents the hope of being rescued, of being saved. In many ways that is the primal and most basic belief of many religions: salvation. There is a great need among the thoughtful, non-savage boys in Lord of the Flies to build a fire, the smoke of which could be seen by an adult, would-be rescuer.

Certainly, fire was used, way back in ancient times, in the service of religion. Burnt offerings were made to the gods above who would look kindly on the puny humans and have compassion for them and save them. Even today, candles are lit in prayer or in  commemoration of miracles, and eternal flames are kept ever glowing in hopes of eternal salvation.

The boys were only doing what mankind has done for centuries: lighting fires in the fervent belief that a savior will take notice of the light or the smoke and come, at last, to save them.

Here's Ralph again, late in the novel, now desperate to keep the fire, and the comfort and hope it brings, alive:

“If Jack was chief he’d have all hunting and no fire. We’d be here till we died.”