A concern regarding transport development in Mizoram is:

Environmental impact on fragile ecosystems
Displacement of local communities
Social and cultural disruptions
All of the above

The correct answer is: d) All of the above

Transport development in Mizoram has a number of concerns, including environmental impact on fragile ecosystems, displacement of local communities, and social and cultural disruptions.

One of the main concerns is the environmental impact of transport development. The construction of roads and railways can lead to deforestation, soil erosion, and water pollution. In addition, the increased traffic can contribute to air pollution.

Another concern is the displacement of local communities. When roads and railways are built, they often cut through traditional land and settlements. This can lead to the displacement of people and the loss of their livelihoods.

Finally, transport development can also lead to social and cultural disruptions. The influx of new people and the changes in the way people live can lead to conflict and tension. In addition, the loss of traditional land and livelihoods can lead to a loss of culture and identity.

It is important to consider all of these concerns when planning transport development in Mizoram. It is essential to find ways to minimize the environmental impact, to minimize the displacement of people, and to minimize the social and cultural disruptions.