I don’t know the answer choices, but here’s what I can help you with.
In 1501, shortly after Christopher Columbus discovered America, Spain and Portugal began shipping African slaves to South America to work on their plantations. In the 1600s, English colonists in Virginia began buying Africans to help grow tobacco.
The answer is A. movement of energy through space or a medium
I believe Kennedy implies this because starting a nuclear war would in the end kill everybody and their would be absolutely no reason to do one.
<em>Hope this helps, Kam</em>