Answer:
Disease spread can affect air travel really badly because it can be so easy for anyone to get infected with how crowded airports can be. This usually results in extra safety steps taken up to cancelled flights due to closed borders. A popular example of this is the current pandemic crisis.
Explanation:
The serologist would perform a precipitin test. Hope this helps.
I believe another term for Natural Selection, based off of the answers provided, I would say C, Survival of the Fittest.
I think that answer is they are like Opposite poles of magnet.
I really hope it’s right
