Final answer:
Low food miles is a requirement for sustainable agriculture but not specifically for organic agriculture, which focuses on non-use of synthetic chemicals and has specific USDA certification standards. (Option D)
Step-by-step explanation:
The requirement that distinguishes sustainable agriculture from organic agriculture is Low food miles. Sustainable agriculture focuses not only on the non-use of synthetic chemicals but also on the reduction of the environmental impact of food production and distribution. This includes the concept of low food miles, which refers to minimizing the distance food travels from the place of production to the consumer to reduce carbon emissions and promote local economies. On the other hand, organic agriculture, while it does emphasize the non-use of most synthetic pesticides and fertilizers, does not specifically require low food miles for USDA certification.
Regarding the other options, USDA certification is indeed required for organic agriculture, while the use of artificial hormones and antibiotics is generally prohibited in organic livestock production. Soil tilling is a practice that might be reduced in sustainable agriculture to maintain soil structure and prevent erosion, but it is not strictly required by organic agriculture, although some organic farms do minimize tillage.