The mongol conquests of much of eurasia in the thirteenth century tended to encourage trade along the silk roads primarily by:

one of the main reasons was definitely slavery. back in 1861, republican abraham lincoln was elected and ended up being a major influence in the slavery business. slavery greatly affected the texas economy because back in 1845 during the annexation of texas, slaves became a big part of the texas population. many texans that were in favor of the secession influenced groups through party ties.

explanation:

queer

that would be the steamboat because none of the other things are forms of transportation