The correct option is:
Slavery increased because the growth of the textile industry increased the demand for cotton.
During the industrialization period in the United States, particularly in the early to mid-19th century, the demand for cotton surged because of the booming textile industry in both the U.S. and Great Britain. This increased demand for cotton led to the expansion of cotton plantations in the South and a corresponding increase in the demand for enslaved labor to cultivate and harvest the cotton. The invention of the cotton gin in 1793 by Eli Whitney further accelerated cotton production and solidified the dependence on slave labor in the Southern economy.