Why did the south vulnerable to a blockade by the north?

The South was vulnerable to a blockade by the North during the Civil War due to its reliance on exports, particularly cotton, which made its economy heavily dependent on trade with Europe. The South had fewer industrial resources and a smaller naval fleet compared to the North, making it difficult to sustain its supply lines. Additionally, the geography of the Southern coastline, with numerous ports, allowed for an effective blockade strategy by the Union Navy, further isolating the Confederacy economically and militarily. This blockade significantly hampered the South's ability to procure necessary supplies and reinforcements.