According to U.S. law, what defines sustainable agriculture?

Sustainable agriculture is defined as farming practices that meet the needs of the present without compromising the ability of future generations to meet their own needs. This includes not only the production of food but also the sustainability of the ecosystems involved. The correct choice emphasizes that sustainable agriculture practices aim to satisfy human food and fiber needs while also improving and maintaining the quality of the environment. This means utilizing methods that enhance biodiversity, support soil health, and reduce pollution, thereby ensuring that agricultural practices can be maintained over the long term.

The other choices focus on aspects that contradict the principles of sustainability. Prioritizing crop yield at the expense of environmental impacts doesn't consider the long-term effects of farming on natural resources. Reliance on synthetic chemicals detracts from sustainable practices because it can lead to soil degradation and pollution issues. Finally, monoculture farming, which focuses on growing a single crop repeatedly, can reduce biodiversity and make crops more susceptible to pests and diseases, further undermining long-term agricultural sustainability.