The correct answer is: a) Nongriat.
Nongriat is a village in the East Khasi Hills district of Meghalaya, India. It is known for its living root bridges, which are made from the roots of rubber trees. The bridges are a popular tourist attraction and are considered to be one of the most unique natural wonders in the world.
The living root bridges are formed when the roots of rubber trees are trained to grow over and around each other. Over time, the roots intertwine and form a strong, stable bridge. The bridges are able to withstand the weight of people and animals, and they are used by the villagers to cross rivers and streams.
The living root bridges are a testament to the ingenuity and engineering skills of the Khasi people. They are a unique and beautiful example of how humans can live in harmony with nature.
The other options are incorrect because they are not villages in the East Khasi Hills district of Meghalaya, India. Tura is a town in the West Garo Hills district, Dawki is a town in the West Jaintia Hills district, and Siju is a town in the South West Khasi Hills district.