How did enslaved persons help to grow the colonial economies and explain why A. Developing new land
B. by producing art and music
C. by producing raw material's
C. by producing manufactured goods
ALSO!!
which of the following is the best explanation of why cotton was grown in the southern colonies ? and explain please

The picture below shows president richard nixon and the first lady standing before the great wall of china in 1972. they are smiling - as are the chinese with them. when this picture was shown on american television, americans were aware that it was a historic moment. what are two reasons why this moment was important for both china and the united states?