Answer:
Traveling from Pittsburgh (Pennsylvania) to New Orleans (Louisiana) in the year 1835, the quickest way to travel is by steamboat.
Explanation:
New Orleans is located in southeastern Louisiana, and is situated right on the Mississippi River delta, one of its main tributaries being the Ohio River, which flows through Pittsburgh.
The fact that both the Mississippi and Ohio rivers have enough flow to be navigable, and that steamboats were an existing means of transportation in the mid-19th century, made it a quick mode of transportation at the time for those who needed to travel from Pittsburgh to New Orleans.