Answer:
Slaves were a permanent labor while indentured servants were only for a few years.
Step-by-step explanation:
Slaves trade was trade that involves buying of African's from different parts of Africa and were later sold buy there slaves masters to their buyers in Europe and American while indentured servant are merely contract workers who can either be whites or blacks doing labor works. They are not stigmatize on racial discrimination or any form.
However, slaves trade was more profitable because it was a big business where African's are sold in exchange for money or unlike indentured servant who are mainly workers that are paid for the labor they carry out. A slave effort or labor can never be paid for because he or she is seen as the property of the master.