01:5
Which geographic concept explains why port cities like Shanghai or Istanbul have become important centers for trade?
dirtanon doon

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.

the award is named for an american naval historian and theorist, rear admiral alfred thayer mahan, united states navy who, through his writing, provided stimulus and guidance to those who share in the defense of the nation.

i believe out of the choices it is a.

people vote for representatives who will make decisions on their behalf.