Which form of transportation was MOST important to development west of the Mississippi River during the 19th century?

steam boats were  really important for transportation because farmers goods had to get to the new orleans  port

Explanation:

in an absolute  monarchy, the  monarchrules as an autocrat, with absolutepower  over the state and government — for example, the right to rule by decree, promulgate laws, and impose punishments. the  monarch isnominally sovereign but the electorate, through their legislature, exercise political sovereignty.