The ‘Silent Valley Hydroelectric Project’ was abandoned due to:

The correct answer is: b) Environmental concerns.

The Silent Valley Hydroelectric Project was a proposed hydroelectric project in the Silent Valley National Park in Kerala, India. The project was abandoned in 1983 due to environmental concerns. The project would have flooded a large area of the park, including a pristine rainforest that was home to many rare and endangered species. The project was also opposed by local people who were concerned about the impact on their livelihoods and way of life.

The other options are incorrect.

• Option a) Cost overruns: The project was not abandoned due to cost overruns. In fact, the project was expected to be profitable.
• Option c) Technical issues: The project was not abandoned due to technical issues. The project was technically feasible.
• Option d) Public protests: The project was abandoned due to environmental concerns, not public protests. However, there were public protests against the project, which contributed to the decision to abandon it.