Whose annual progress report for 2016-17 recorded a 75 per cent decline in the Great Indian Bustard population over the previous 30 years?

The correct answer is the Wildlife Institute of India. Its annual progress report for 2016-17 recorded that the population of the Great Indian Bustard had fallen by three quarters over the thirty years before that report, a decline driven by the loss of its grassland habitat and by pressures created by people, and made harder to reverse by the slow rate at which the bird breeds. The same institute carried out the long-term telemetry studies that identified the fenced grassland areas inside Desert National Park as prime breeding habitat for the species, so its work shaped both the diagnosis and the choice of release site. Option A, the Zoological Survey of India, option C, the Bombay Natural History Society, and option D, the National Biodiversity Authority, are each wrong because none of them is named as the source of that population estimate or of the telemetry work behind the rewilding plan.