Environment Ecology question with answer

Q.While India’s Human population is growing at an astounding pace, the bird population is shrinking fastly mainly because 1. There has been an abnormal increase in the number of hunters. 2. Bio-pesticides and organic manure are being used on a large scale. 3. There has been large-scale reduction in the habitats of the birds. 4. There has been a large-scale use of pesticides, chemical fertilizers and mosquito repellents. Select your answer correctly using the code given below. Code