Foreclosures were a common occurrence in the early 1930's, as thousands of Americans lost their entire life savings and eventually their homes once the stock market crashed in 1929.To help provide Americans with help, Franklin D. Roosevelt creates the Federal Housing Administration.
This government agency helps to provide small loans for home construction. Providing these loans would help the economy recover, as new home construction is a sign of economic prosperity. By limiting the size of the loan, individuals were able to make reasonable payments and this allowed for relief, especially on America's middle class.
Sometimes they figure out how to build better shelters or learn better farming and hunting techniques for the environment they live in
I am pretty sure its D. I am not 100% positive but I read an article and that appears to be correct.
The desert which covers much of Botswana is called the Kalahari Desert.