In a particular region in India, the local people train the roots of living trees into robust bridges across the streams. As the time passes, these bridges become stronger. These unique 'living root bridges' are found in

• (a) Meghalaya: Correct. The famous living root bridges are found in Meghalaya, especially in the Khasi and Jaintia Hills, where roots of rubber fig trees are trained across streams.
• (b) Himachal Pradesh: Incorrect. This state is known for Himalayan terrain and conventional bridges, not living root bridges.
• (c) Jharkhand: Incorrect. Jharkhand has rich forest and tribal landscapes, but this unique bridge tradition is not associated with it.
• (d) Tamil Nadu: Incorrect. Tamil Nadu does not have the well-known tradition of living root bridges.

Answer: (a) Meghalaya.