Desertification would most impact climate area first ?

I hope this is related but...

Explanation:

Both natural variability in climate and global warming can also affect rainfall patterns around the world, which can contribute to desertification. ... And a warmer climate can speed up the decomposition of organic carbon in soils, leaving them depleted and less able to retain water and nutrients.

i only have part a but here is the first one: - lewis and clark are born

- lewis marries sacajawea and clark is jealous  

- clark drowns lewis and then goes to jail