Attempt this previous-year question. The correct option stays hidden until you choose.
Other than poaching, what are the possible reasons for the decline in the population of Ganges River Dolphins?
1. Construction of dams and barrages on rivers
2. Increase in the population of crocodiles in rivers
3. Getting trapped in fishing nets accidentally
4. Use of synthetic fertilizers and other agricultural chemicals in crop-fields in the vicinity of rivers
Select the correct answer using the code given below.
Pick an option to check yourself.
• Correct Answer: C
• Dams and barrages fragment habitat and isolate dolphin populations; accidental bycatch in nylon gillnets is a leading cause of mortality; agricultural chemicals cause eutrophication and bioaccumulation.
• 2 is wrong: There is no evidence that crocodile population increase threatens Ganges River Dolphins.
Attempt Prelims MCQs or open Mains questions by paper — then continue the same bank inside the app with visual decks.
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