Which geographic factor contributed to the increase in slave labor? A rapidly moving rivers
B cheap and fertile land
C the production of tobacco
D numerous trade routes

Because the economy of the South depended on the cultivation of crops, the need for agricultural labor led to the establishment of slavery. It also created a society sharply divided along class lines. For this reason, the contrast between the rich and the poor was greater in the South than it was in the North.

Explanation:

the answer is option a.

i believe the answer is a