They mostly grew wheat, barley, oats, rye, and corn. because of this, they were basically known as the "Breadbasket". So I believe your answer would most likely be wheat.
War want very popular with the public and with most politicians <span />
Although there are many global issues that are a primary threat to <span>biodiversity in the tropical regions of Central Africa, Southeast Asia, and the Amazon basin the best answer is "deforestation". </span>
Answer: More people are becoming prosperous and can now afford vehicles
Explanation: The nation is building new things and there is new jobs so people are getting hired and getting jobs then they can afford jobs and get vehicles which was a economic impact on transportation use