Answer:
Lands were offered with cheap prices, but if they could farm and live for 5 years, lands were free for them.
Step-by-step explanation:
In the 1800s, few people lived in the Great Plains, this region is the central United States, which has a very dry climate. In order to incentive people to occupy this territory, government sold this lands for a really cheap prices to those family who would live there. If they lived and farmed 5 years, lands were their, for no price.