Respuesta :
The correct answer is d.
Pathogens and parasites cause vector-borne diseases in human populations. A carrier organism is something that carries a disease (aka parasites). Thus, contact with a carrier organism equates contact with the disease it's carrying.
Pathogens and parasites cause vector-borne diseases in human populations. A carrier organism is something that carries a disease (aka parasites). Thus, contact with a carrier organism equates contact with the disease it's carrying.