Read the statement. The Mount Vesuvius eruption was one of the worst disasters in human history. Why is the statement an opinion? It is objective. It is subjective. It can be proven to be true. It reports events and ideas.

Not sure but if you check wiki they might have the answer

Explanation:

On. Wikipedia

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.

john maynard keynes developed new economic theories in response to the : b) great depression of the 1930s. his theories are so important that they are known as "keynesianism". in his works he supports the idea of a government with deeper involvement and intervention to end the great depression.