The Nathu La Pass is a high-altitude attraction with significance for:

Border trade with China
Pilgrimage routes
Wildlife spotting
Historical battle sites

The correct answer is: a) Border trade with China.

The Nathu La Pass is a high-altitude mountain pass in the Himalayas on the India-China border. It is located in the Sikkim state of India and the Tibet Autonomous Region of China. The pass is 4,310 meters (14,140 feet) above sea level and is the second highest motorable road in the world.

The Nathu La Pass was opened for trade between India and China in 1992. It is a major trade route between the two countries and is used to transport goods such as tea, spices, and textiles. The pass is also a popular tourist destination and is known for its scenic views of the Himalayas.

The other options are incorrect because:

  • Pilgrimage routes: The Nathu La Pass is not a major pilgrimage route.
  • Wildlife spotting: The Nathu La Pass is not a major wildlife spotting destination.
  • Historical battle sites: The Nathu La Pass is not a major historical battle site.