Why was the union able to destroy the confederacy?

The Union was able to successfully create the blockade of most Southern ports; built ironclads to maintain the naval blockade
Captured New Orleans and had victories in Kentucky and Tennessee; captured Vicksburg; controlled the Mississippi River
Attempted to capture Richmond during the Battle of Bull Run but failed. Was later able to capture Richmond which led to the end of the war

The Union was to be a successfully creator of the blockade of most Southern ports built ironclads to maintain the naval blockadeCaptured New Orleans and had victories in Kentucky and Tennessee captured Vicksburg controlled the Mississippi RiverAttempted to capture Richmond during the Battle of Bull Run but failed. Was later able to capture Richmond which led to the end of the war

I'm hella smart but i dont know that

The us is first  the  u.s. economy  remains the  largest in the world  in terms of nominal  gdp. however, the  u.s. economy  loses its spot as the number one  economy  to china when  measured  in terms of  gdp  based on ppp. in these terms, china's  gdp  is $23.19 trillion exceeds the  u.s. gdp  of $19.42 trillion