To what does the great migration refer?

Answer & Explanation:

The Great Migration refers to the relocation of hundreds of thousands of African Americans from the rural areas of the South to urban areas in the North during the years between 1915 and 1930.

done

explanation:

during the 20th century, the role of the vice president has evolved into more of an executive branch position. now, the vice president is usually seen as an integral part of a president's administration and presides over the senate only on ceremonial occasions or when a tie-breaking vote may be needed.