The two technological advances that led to a significant increase in the enslaved population in Georgia from 1830 to 1860 are:
A. Cotton Gin
B. Railroads
The cotton gin, invented by Eli Whitney in 1793, greatly increased the efficiency of cotton processing, which in turn fueled the demand for slave labor to cultivate and harvest cotton. Railroads facilitated faster transportation of cotton and other goods, supporting the expansion of plantations and the slave economy in the South.
While the steamboat was also important for transportation, the specific focus on cotton production and the expansion of the plantation economy makes the cotton gin and railroads the most direct influences on the increase of the enslaved population. The telephone, which was invented later in the 19th century, would not have been relevant in this context.