#1. The drive to expand westward.
#2. to rid the land of the 'savages'.
Answer:
Population
Explanation:
A population is the entire pool from which a statistical sample is drawn. A population may refer to an entire group of people, objects, events, or measurements. A population can thus be said to be an aggregate observation of subjects grouped together by a common feature.
In the 1920s, the danger of buying stock on credit was that if the stock dropped, borrowers have to make up the difference.
When the stock dropped, basically the borrowers losing an amount of value of his assets. But since he bought the stock before the price was dropped, he had to make up the difference
