Read the passage carefully and answer the question. The Taj Mahal, one of the Seven Wonders of the World, 1. _____ on the banks of the Yamuna River in Agra. Built by Emperor Shah Jahan in memory of his beloved wife Mumtaz Mahal, it is an architectural masterpiece. The monument 2. _____ thousands of tourists every year. The intricate marble work and the beautiful gardens 3. ______ its charm. However, pollution and the growing number of visitors have 4. ______ its preservation. The authorities are taking steps to 5. ______ the monument for future generations. Question: Select the most appropriate option to fill in blank 1.

1. stands
2. standing
3. stood
4. stand