Respuesta :
The correct answer is: "A privately-owned chicken farm deposits the majority of chicken poop into the river that flows through the property."
The economic activity of the chicken farm is generating a negative externality, which is the denomination used to refer to a cost beared by an external party as a result of an economic activity.
The economic activity of the farm consists on raising chicken but, meanwhile, the farm generates pollution and damages the purity of the water in the river, which is a public good and should be kept in good condition to be used by other economic agents as well.