Answer:
the cycle of night and day
hope this helps :p
Explanation:
Because asthma is aninheirited trait most of the time. It makes it hard to breath when active and need air. It brings mucus in the lungs and cloggs most of the lungs. Making it hard to breath.
I don't think the answer is A as that seems a bit drastic, I think it's C.
Most of the predators were gone and suddenly niches were available so almost all the offspring were likely to survive and reproduce
