Answer:
B.) Oceanic crust
Explanation:
The oceanic crust is generally thinner than other Earth layers. The oceanic crust is the thinnest layer of the Earth, amounting for less than 1 percentage of earth's volume.
Well it's impossible for different population to have the same name.
So I would say this for the answer.
One population can have the same name.
What type of answer are you looking for? DNA? Or inheritance? Genes?
Change in the external Environment may resulted in the changing in the population of beetles.