B) Berlin Wall because it was a real physical structure that was a symbol of the Iron Curtain.
The AG industry was able to provide way bigger amounts of food. With higher amounts and productivity gave farmers a easier time to keep up with the growing population around the world. more people means higher demand for food in larger quantities.
B. A house keeper wounded fall under the category of domestic and personal services because they are not professional like maids or butlers.
I think c hope that helps and i am sure
