The southern colonial economy was based on
exportation of crops
manufacture of finished goods
selling of enslaved people
shipping enslaved people

Exportation of crops.

Explanation:

The Southern Colonies concentrated on agriculture  and developed plantations exporting: tobacco, cotton, corn, vegetables, fruit, grain and livestock.

The Southern Colonies had the largest slave population; who worked on the Slave plantations.

The answer is A) cash crops!

It's right on Edg :)

b) race riots in several cities

in the 1800s, locomotives powered by steam made transportation faster and cheaper. the resulting rapid growth of railroads led to the connection of the atlantic and pacific railroad in oklahoma city in 1897.

in the last years of the century, the improvement of steam-based engines the expansion and growth of railroads. this growth increased when the companies started to build and expand, such as the atlantic and pacific railroad, which connected new mexico with california, and missouri with oklahoma. many of these new networks were built in oklahoma, and these changes transportation henceforward.