Opposition to the construction of large dams is due to

The correct option is D

All the above

The correct option is option D.

Explanation for Correct option:

1. Opposition to the construction of massive dams arises from social, economic, and environmental issues, as large dams are built at the highest possible cost, leading the economy to suffer.
2. Dams are built at the maximum cost, causing the economy to suffer and large sections of natural forests to be submerged.
3. The displacement of a large number of indigenous people occurs as a result of the construction of a dam in a hilly terrain prone to earthquakes and landslides.
4. Dams require hydropower to generate electricity and can be used to collect and store water that can be evenly dispersed in various regions.
5. They obstruct the flow of water in specific land areas.

Final answer: Opposition to the construction of large dams is due to social, economic, and environmental reasons.