Final answer:
The proper sequence is National Road, steamboat on Mississippi, Erie Canal, and then the Baltimore and Ohio Railroad.
Step-by-step explanation:
The correct sequence of transportation developments is the following: first, the steamboat was introduced on the Mississippi River with the advent of Robert Fulton's steam engine in 1807. Next, work began on the National Road, also known as the Cumberland Road, during the early dates of the transportation revolution. Subsequently, in 1817, work on the Erie Canal commenced, and it was completed in 1825, providing a water route from the Great Lakes to the Atlantic Ocean. Lastly, the Baltimore and Ohio Railroad work started, with the first American railroad inaugurated in 1831 connecting Albany and Schenectady, NY. Thus, the series of events in proper sequence is work begun on National Road; steamboat introduced on Mississippi River; work begun on Erie Canal; work begun on Baltimore and Ohio Railroad.