While you didn't really provide the "following" as the comment above me states, in general, the advantage of secondary sources of primary ones is that they perhaps provide a more objective or even just a broader view on a certain topic. While a primary source of the American civil war would be a letter written by a soldier, a secondary source would be a book that describes more letters taken together and discusses possible information regarding them.
Answer:
They used irrigation to combat the lack of natural resources :)
<span>the progressive were people from the middle class who had confidence that they could achieve social progress through political reform. </span>
Answer:
A and D
Explanation:
Me and my homies hate Segregation >:(
Organizing a business and making a will or planning an estate