Answer:
The answer is actually c. Many natural barriers- such as mountains- led to less warfare in the region.
<span>C. The drought and ecological disaster of the central United States in the 1930s
The Dust Bowl describes the affect of a drought on the central americas, which led to plain fires, creation of deserts (as there was little water), as well as the effect it has on the crop market, the availablity of crops, as well as prices.
hope this helps</span>
I believe the correct option would be a. Industrial resources
It was the "Open Door Policy" that was the name of the trading policy that Secretary of State John Hay initiated with China and the European nations that already had a presence there, since the US wanted to benefit from trade with China as well.
For Question 3, your answer should be D.
Many European powers divided their territories based on resources instead of tribes, which caused tribes that were hostile with each other to be placed under the same rule. This led to conflicts between Native African tribes as they were natural enemies who fought for the same resources and land.
hope this helps
