The correct answer is: a) High-speed rail network.
Meghalaya is a state in northeastern India. It is characterized by its mountainous terrain, with many peaks over 1,000 meters (3,300 feet) in elevation. The state is also home to several major rivers, including the Brahmaputra and the Meghalaya.
The expansion of a high-speed rail network in Meghalaya would be very challenging due to the state’s mountainous terrain. The construction of high-speed rail lines requires a relatively flat surface, which is not available in most parts of Meghalaya. Additionally, the state’s many rivers would need to be bridged, which would be a costly and time-consuming process.
Electric scooter rentals, cable car systems, and improved bus services would all be less challenging to expand in Meghalaya than a high-speed rail network. Electric scooters and cable cars can be operated on relatively small and narrow roads, which are more common in Meghalaya than flat surfaces. Additionally, bus services can be operated on existing roads, which would not require any new construction.
In conclusion, the expansion of a high-speed rail network would be the most challenging mode of transport due to Meghalaya’s terrain. Electric scooter rentals, cable car systems, and improved bus services would all be less challenging to expand.