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:
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A.
1 and 2 only
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B.
2 and 3 only
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C.
1, 3 and 4
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D.
1, 2, 3 and 4
Correct Answer:
C. 1, 3 and 4
Explanation:
Inhabiting the Ganges-Brahmaputra-Meghna and Karnaphuli-Sangu river systems in India and Bangladesh, the Ganges River Dolphin population has plummeted from 6,000 in 1982 to fewer than 1,800 today. This decline is driven by dam development and contamination from industrial waste, fertilizers, and pesticides, rather than the local crocodile population.
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