Which of the following climate zones would be the most hospitable to humans?

d. subarctic

Explanation:

The most inhospitable zone on the planet would lie in the upper parts of the earth and these include the northern parts of the arctic circle and the population located there is very sparse and has a low in terms of the human growth and thus is very inhospitable for the germination if the many microbes and life forms.

Answerstratovolcanoes///near or in the ring of fire;