The correct option is A DDT- Dichloro Diphenyl Trichloroethane
DDT (dichloro diphenyl trichloroethane) a chemical pesticide did not decompose readily and persisted in the environment. Since it was soluble in fat rather than water, it biomagnified up the food chain and disrupted calcium metabolism in birds, causing eggshells to be thin and fragile. So DDT is now banned in most of the western countries.