Sikkim’s focus on promoting eco-tourism might encourage the use of:

The correct answer is: d) All of the above

Sikkim’s focus on promoting eco-tourism might encourage the use of electric vehicles, bicycles, and cable cars.

• Electric vehicles are a type of vehicle that uses an electric motor instead of a gasoline-powered engine. They are often seen as a more environmentally friendly option than gasoline-powered vehicles, as they do not produce emissions.
• Bicycles are a type of human-powered vehicle that has two wheels and is propelled by pedals. They are often seen as a healthy and environmentally friendly form of transportation.
• Cable cars are a type of transportation system that uses suspended cars to carry passengers over long distances. They are often seen as a scenic and environmentally friendly way to travel.

All of these modes of transportation can help to reduce pollution and traffic congestion, and they can also provide a more enjoyable experience for tourists.