Final answer:
The phrase in question refers to imagery from b) 'Lord of the Flies' by William Golding, which signifies the boys' descent into savagery and the loss of innocence on the deserted island.
Step-by-step explanation:
The phrase "human heads on sticks outside of a hut as decorations" is significant in "Lord of the Flies" by William Golding. In Golding's novel, this imagery is invoked when the characters, a group of boys stranded on an uninhabited island, start exhibiting primal and savage behavior, deviating far from the civilized values they were used to. This symbolizes the descent into barbarism and the loss of innocence. It's a powerful representation of the theme of civilization versus savagery present in the book.
Hence, the correct answer is Option B.