The answer to the given question above would be the second option. Based on the given scenario above, the reason why the new rodent with the nearby rodents and gets viable but infertile offspring is that the <span>new rodents probably derive from fairly recent ancestors that experienced dispersive allopatric speciation. Hope this helps.</span>
Dispersive allopatric speciation, geographically move apart the population of any species thereby restricting gene flow between the sub-populations
These genetic difference accumulate and with time and cause genetic drift and variable selection pressures on the subpopulations.
This causes the separation up to an extent that even if the organisms from these two sub-populations are some how brought close to each other , they will yet not interact with each other and would remain two genetically distinct populations. The differences in mating preference and hybrid inferiority keep these sub-population separate from each other.
Answer: Reproductive problems from imbalanced hormones can occur when abnormal levels of estrogen and androgen sex hormones develop, and can cause infertility and other health issues.
