Abuses are often rooted in ethnic problems.
Answer:
By using Gateway Arch as the symbol to represent United States expansion policy.
Explanation:
Gateway Arch, which is located in St. Louis Missouri, was designed by Error Saarinen in 1948 and its construction was completed in 1965, costing a whopping is $13million at the time.
It derived its name from "Gateway to west", a slogan used by the US during the westward expansion in the 19th century.
The artist used the Gateway Arch symbol to represent the a door to the western part of United States.
It required all territories to abolish slavery before becoming states.
And it made the mississippi river the divding line between slave states and free states. it also prohibited slavery in most of the former louisiana territory except for missouri.
