I think the answer to this is D.
Answer:
to reproduce, create offspring, and keep humanity growing
Explanation:
Engaging in intercourse and creating offspring ensures that mankind will not become extinct.
Continental Polar or continental arctic. They are cold, dry, and stable.
Some environmental risk can be an unbalanced surface of where you're doing the exercise, what's actually occurring around you like if you are exercising where cars or dangers are ,chemicals
D. caffeine is an example of an inhalant .