Question

which of the following explains one important reason behind Europeans' decision to rely on Africans, rather than American indigenous peoples, for labor on American plantations?

Answer 1

You have not included "the following," but it is possible to answer this question by saying that Europeans relied primarily on Africans rather than on American indigenous peoples for labor because the former were significantly more resilient and immune to the microbes conveyed by the Europeans than the latter. It must be added, nevertheless, that the American Indians were also slaved in large numbers and sent to work in areas like the West Indies or Mexico.

Answer 2

Typically, the main reason why the Europeans decided to rely on the Africans for labor on American plantations rather than on American indigenous people because Africans are longed been exposed to small pox and they have already developed immunity in most of the common European diseases.