Final answer:
Shelley uses imagery to convey the idea that nothing of Ozymandias remains intact.
Step-by-step explanation:
Shelley uses the literary device of imagery to convey the idea that nothing of Ozymandias remains intact. Imagery refers to the use of vivid and descriptive language to create mental images in the reader's mind. In the poem 'Ozymandias,' Shelley describes the broken statue of Ozymandias and the surrounding lifeless desert, using powerful visual imagery to emphasize the idea of decay and impermanence.