Final answer:
The Tsdembaga's swidden potato farming in Papua New Guinea differs from U.S. factory farming as it follows sustainable farming practices, avoiding the use of advanced machinery, monoculture, and chemical fertilizers commonly employed in U.S. agriculture.
Step-by-step explanation:
In what ways does swidden potato farming among the Tsdembaga of Papua New Guinea differ from the factory farming of potatoes in the U.S.? Among the listed answers, the correct one is that the Tsdembaga practice sustainable farming. This traditional form of agriculture, also known as slash-and-burn, allows for the maintenance of healthy and fertile soils by employing practices such as crop rotation, unlike the intensive agriculture of the U.S., which often relies on chemical fertilizers, genetically modified seeds, and the use of heavy machinery.
While the other options suggest that the Tsdembaga might use advanced machinery, rely on monoculture, or use chemical fertilizers, none of these apply to their traditional swidden farming practices, which are more focused on ecological sustainability and using local knowledge and techniques to cultivate their crops.