It would be "none of the above" powers that justified the actions of the southern states prior to the Civil War in terms of secession, since the Constitution's main purpose was to preserve the Union.
In the middle of North America is a huge area of land which was once covered with grasses and colorful wild flowers. The French called the rolling plains of grass "prairie", from the word for a meadow grazed by cattle. The prairies are a type of grassland dominated by herbaceous plants and grasses. Very few trees grow on the prairies and are usually widely scattered.
