The traditional method of transporting goods on elephants, known as ‘hathi運行 (yùnxíng – operation)’ (Assamese word needed), is no longer widely used due to:

The correct answer is: All of the above.

• Environmental concerns: Elephants are an endangered species, and their use for transportation can put them at risk of injury or death. Additionally, the use of elephants for transportation can damage their habitat and contribute to climate change.
• Government regulations: Many governments have banned or restricted the use of elephants for transportation in order to protect the animals and their environment.
• Availability of alternative transport: There are now many alternative forms of transportation that are more efficient and less harmful to the environment than using elephants. These include trucks, trains, and airplanes.

In addition to these factors, the use of elephants for transportation is also often seen as cruel and inhumane. Elephants are intelligent and social animals, and they are not well-suited to being used as pack animals. They can suffer from physical and psychological problems as a result of their forced labor.

For all of these reasons, the traditional method of transporting goods on elephants is no longer widely used.