I think it is the 3rd one because health problems at older age.
I think its B.all the members of a population ate genetically very similar etc
Explanation:
the answer is b because the consewuences of global warming had not yet pass
<u>Answer</u>: C) Directional selection occurs when one of two extreme phenotypes is selected for.
The type of natural selection known as directional selection is defined in population genetics in the case in which an extreme phenotype is favored over other phenotype. Thus, the population and its allele frequency will evolve towards this end of the trait spectrum (extreme phenotype). This is also the case illustrated in the graph where the right side represents the extreme phenotype.
