Final Answer:
Agriculture can help the transportation industry reduce its dependency on foreign energy sources by producing grain for biofuels. Option D is the answer.
Step-by-step explanation:
The option "Producing grain for biofuels" (Option D) is the correct choice. Biofuels, such as ethanol produced from grains like corn, offer a renewable and domestically sourced alternative to traditional fossil fuels. When agriculture focuses on producing crops specifically for biofuel production, it contributes to reducing the transportation industry's reliance on foreign energy sources.
By cultivating crops for biofuels, countries can enhance energy security, decrease dependence on imported oil, and promote a more sustainable and environmentally friendly approach to fueling vehicles. This strategy aligns with efforts to create a more self-sufficient and resilient energy infrastructure.
Option D is the answer.