Hello there
the answer to your question is
Agnosia
Best Regards Queen Z
A is your answer. When only one parent produces the offspring, they are essentially cloning themselves, and it is called asexual reproduction. The offspring only have the genes of the one parent. A lack of genetic diversity is one of the drawbacks to asexual reproduction.
I'd have to say it'd be the dramatic increase in the diversity of the population gene pool.The increased diversity can lead, in time, to a dramatic increase in the number of distinct species in an environment.
I am not totally sure but I think it’s B