ANSWER:
I think it is the first one
Explanation:
Speciation is the process in which new species are created through evolution. I might be wrong though.
the evolutionary process through which new species emerge
"Exponential growth" means that the bigger it is, the faster it grows.
That's Choice 'D'.
Its stabilising. Since the selection pressure is against the extremes which are the normal blood and the sickle cell anaemia.
