Income us cities for marvels or stone architecture. They built with stone blocks.
The correct answer is Walking over land bridges, i took the test.
In most empires, trade is important as it is a vital interaction for every country in the world. Without trade, countries would have to provide their own resources for every aspect in their daily life. Take for instance items such as food, clothing and technology.
The German people went along with the Nazi policy because they were scared of what would happen to this if they didn't. It's sad and unfortunate, but they would rather go along with the policy and keep there own lives.