Access to drinking water access to water for crops
means of transporting goods in trade

What is the best title for the list?

The answer is complicated but the best answer would be that much of the native American populations initially used by European colonies died from disease to the point that their population could no longer sustain the plantations.

Explanation:

This answer is the most reasonable to me but another common answer is that European colonists often viewed Africans as more resilient and thus more sustainable for the harsh conditions of plantation labor.