As a result of general sheridan’s use of the total war strategy during the shenandoah valley campaign, the south
retaliated by marching to the sea.
could not provide supplies for its army.
surrendered and brought an end to the war.
vowed to destroy civilian resources in the north.

The answer was the South could not provide supplies for its army. Sheridan applied a “scorched earth” campaign in the valley.  He had burned and destroyed anything that could be of use to the rebels.  Though General Jubal Early launched a surprise attack that caught the Union off guard, Sheridan rallied the men and turned the tables defeating Early and the Senandoah Valley was closed to the South.

answer; /// i do believe that its napolean's conquest of spain;

while it was true that the cotton gin reduced the labor of removing seeds, it did not reduce the need for slaves to grow and pick the cotton.

explanation:

before eli whitney's invention of the cotton gin, picking and cleaning cotton was a slow, labor-intensive job. workers, usually slaves, had to pick the seeds from the cotton fibers by hand. this invention made it possible to grow large amounts of cotton on big farms and make money.