"to create a sound effect by repeating sounds"
The figurative device used here pertains to having the same or similar connected words. This is clearly seen in the text.
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Answer:
leave ,will not support,port,..
Maybe if you try to add transitioning words like then finally therefore but and so but i think you should fix the last sentence and combine it to the sentence before to Pompeii was an important city to Rome because it was a major trading area therefore we have learned so much about the Roman lifestyle and life during the eruption due to the ash preserving everything and consuming it all.