Final answer:
Inbreeding does not directly contribute to changing allele frequencies in populations, unlike mutation, genetic drift, migration, and natural selection, which are evolutionary forces that drive such changes.
Step-by-step explanation:
The process that does not contribute to changing allele frequencies in populations is inbreeding (Option B). Inbreeding is the mating of closely related individuals which can increase the chances of offspring being affected by recessive or deleterious traits. However, while inbreeding can have various effects on the genetic structure of a population, it does not directly change the allele frequencies. Instead, it increases the proportion of homozygous individuals without introducing or removing alleles from the population.
On the other hand, mutation, genetic drift, migration (or gene flow), and natural selection are all evolutionary forces that can alter allele frequencies in a population, either by introducing new genetic variation or by changing the prevalence of existing alleles.