The answer is the 1st one. Hope it helps :)
The answer is : <span>Conquest of the Roman empire followed by Germanic invasions</span>
The people of the Indus Valley. Some of them were farmers. They grew crops like barley, peas, wheat, dates, and melons. The farms were not just for , some grew cotton and raised sheep, pigs, and cattle. Every town had its own storage building to hold what that town needed.
The answer is wheat. Wheat was one of the most exported products in the US because of its abundance. North America owns the largest fertile lands in the world. They make up 50 percent of the kernel production in the world. Wheat was being exported during the 19th century because most countries like Russia, Great Britain can not grow such product because of its climate and geographical location.