The sentence that explains how the Great Pompeii Project and the Herculaneum Conservation Project are similar is:
Both have restored multiple types of architecture and art.
Explanation:
1. The Great Pompeii Project and the Herculaneum Conservation Project are both focused on the restoration and conservation of historical sites in Italy.
2. They share the similarity of restoring multiple types of architecture and art, which involves the preservation of buildings, sculptures, paintings, and other cultural artifacts found within the archaeological sites of Pompeii and Herculaneum.
3. This restoration work aims to protect and showcase the rich cultural heritage of these ancient Roman cities that were buried under volcanic ash after the eruption of Mount Vesuvius in 79 AD.
By restoring various architectural structures and artistic pieces, both projects contribute to the preservation and promotion of these significant historical sites for present and future generations to appreciate.