I think the answer is 4/D:All of these answers are correct!
It dried up.
North Africa used to be a fertile grassland, even swampy in some spots, 12,000 years ago. By 1000 BC (actually quite a while before) it had dried up into what is the the largest desert i the world: the Sahara.
Answer:
The Holocaust, also known as the Shoah, was the genocide of European Jews during World War II. Between 1941 and 1945, Nazi Germany and its collaborators systematically murdered some six million Jews across German-occupied Europe, around two-thirds of Europe's Jewish population.
Answer:
In the years before the Civil War, the North had surged forward with industrial production and this led to the emergence of a large urban population and indeed a larger population than the South as many people came to work there. The North also had a lot of rail lines to transport their goods and ship building yards to send goods abroad.
This was in contrast to the South that was mostly rural and depended a lot of plantations. Rail lines were not as much and industry compared to the North was significantly backward. Their population was also significantly less than the North.
This influenced the outcome of the war in Union favor because the Union was able to field more soldiers who were also better equipped and could be moved around the country relatively quickly to support multiple fronts. The ships built by the North were able to blockade the South and deny them any international support as a result.