Question

What statement shows the reason African slaves were brought into the British colonies in Southern North America in the 17th century?
Northern colonists considered slavery immoral.

Southern colonies did not want Indians as forced labor.

Industrial factories in the north had no need for slaves.

The Southern colonies’ economy had growing labor demands

Answer 1

The southern colonies' economy had growing labor demands

Answer 2

The correct answer is the fourth option. The Southern colonies' economy had growing labor demands. 
Crops like tobacco and cotton required lots of physical labor to plant and harvest them. Plantations used slaves for labor. 
Hope this helps! Please let me know if I'm wrong. :)