Opposition to the construction of large dams is due to

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Social reasons

Economic reasons

Environmental reasons

All of the above

answer is D.

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Detailed Solution

Concept- Many indigenous people are forced to relocate when a levee is built in a hilly terrain prone to unanticipated earthquakes and landslides.
Because huge heads are built at the highest possible cost, which diminishes thriftiness and submerges vast areas of natural woods, opposition to their development stems from social, financial, and environmental considerations. Heads are built to store water that may be irregularly dispersed in various locations and to generate electricity. They can also be used to collect water.
They facilitate water inflow in particular land areas. The environmental balance and the connection between the water and the land, which took thousands of years to develop, are being destroyed by the construction of heads. It causes soil erosion, which lowers the foundation and holds back the deposition cargo that is generally set up in a swash inflow, endangering vegetation and swash species. Due to their slow movement and ability to produce
Hence, the correct answer is option 4.

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