What geographic feature was central to where and how the first civilizations developed?

Which of the following inventions most directly allowed ancient farmers to produce a surplus ?

Nhis essay about the atomic bombing of japan during world war ii, a student has used statistics he found in an article in the online archives of the irish times. the article is from may 5, 1997, and is called “cancer finding in hiroshima.” there is no author given. how should the student cite this source using mla citation format?

After ww2, the soviets began setting up what type of governments in countries closest to them