I want to know the answer to the following question:
What action of the Union damaged the southern cotton exports?
All the background I'm provided with is that "During the American Civil War, American cotton exports slumped due to a Union blockade on Southern ports, and also because of a strategic decision by the Confederate government to cut exports, hoping to force Britain to recognize the Confederacy or enter the war.". Is that enough to answer the question?
Answer: yes