how was the development of the phosphate industry different in south carolina than in the rest of the country? (answer choices in the pic)

The right answer is:  

South Carolina had an abundance of phosphate deposits and became a world leader in the industry: other areas of the country had other mineral resources, which they developed.  

Explanation:  

Phosphate mining in the US begins in 1868 in coastal South Carolina in a large-scale. Access to river transport and proximity to a port, Charleston, encouraged exports, South Carolina was producing half the world's phosphate by 1885.

South Carolina had an abundance of phosphate deposits and became a world leader in the industry: other areas of the country had other mineral resources, which they developed.