Read the following excerpt from a literary essay.
Many literary works utilize metaphor as a significant structural device, allowing authors to convey complex ideas through relatable imagery. For instance, in William Golding's 'Lord of the Flies,' the conch shell serves not only as a physical object but also as a metaphor for civilization and order. Its gradual degradation parallels the boys' descent into chaos, thus highlighting the fragile nature of societal constructs. Understanding this interplay between structure and metaphor enhances the reader's interpretation and appreciation of the text.
Based on this excerpt, which statement best describes how the text is structured to achieve its purpose?