Hello User!
I think the answer is..
Answer:
A
Step-by-step explanation:
The relative change in frequency of allele is called genetic drift. Genetic drift is basically observed in a population of small size where there are high chances of loss of allele that occur in irregular manner. Genetic drift continues till the allele (involved in the drift) is either lost or becomes the only gene with in the population.
If I'm wrong I'm sorry If it not A then it D