Question

[Please HELP] Two populations of squirrel became separated by a large canyon. When scientists introduced members of one population into the other, they would no longer interbreed. Because of this, the squirrels were classified as two different species. What have these two populations of squirrels undergone?
A. Succession
B. Speciation
C. Biomagnification
D. Genetic engineering​

Answer 1

Since two populations of squirrels were separated and they are both classified as different species, hypothetically saying that they have different characteristics, we could assume that two different species was made by another organism, and not the environment. So the answer is B. Speciation