Other than poaching, what are the possible reasons for the decline in the population of Gangas 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.
- A. 1 and 2 only
- B. 2 and 3 only
- C. 1, 3 and 4 only
- D. 1, 2, 3 and 4 only
Answer: C
Explanation
Crocodile population has nothing to do with the decline in population of dolphins. It is human activities that are mainly responsible.