The answer is a (4) I hope this helps out a bit
Answer:
dichloro-diphenyl-trichloroethane
Explanation:
DDT is an insecticide that can pass up the food chain from insects to small birds, and then from the small birds to birds of prey, like hawks. It can accumulate in the birds of prey, giving them a large amount of DDT
If it’s a yes or no question then yes because they spread through organisms. there are many organisms in the water that bacteria can spread through