Concept:Sentences must be arranged in a logical order to form a coherent paragraph.
Explanation:Start with the introduction: "The excavation of Pompeii provided a remarkably well-preserved glimpse into life in ancient Rome." (Sentence 2).
Then explain why it is unique: "Unlike other ruins, Pompeii remained frozen in time due to Mount Vesuvius' sudden eruption." (Sentence 4).
Next describe the event: "When the eruption occurred, a thick layer of hot ash and pumice rapidly buried the town." (Sentence 3).
Finally give the reason for preservation: "It cut off oxygen and prevented the usual decay caused by air, moisture, and bacteria." (Sentence 1).
The correct order is 2, 4, 3, 1.
Answer:D.
2−4−3−1