I’m not quite understanding this question can you explain which best describes bottleneck? Which of the following can be considered an example of "bottleneck effect" of genetic drift?An invasive predator suddenly moves into a population of white and black moths, and quickly eats most of the white moths, leading to anoverrepresentation of the black allele in the population.A population of penguins has multiple alleles for beak length. Long beaks allow penguins to hunt more fish, increasing their ability to reproduce. A stormoccurs and kills off population members with the long beaks, leaving only individuals with short beak length.Agroup of bats separates from a large population on the mainland, and flies to a nearby island. Members of the island population randomly had allelesthat gave them sharp fangs, which help them feed on beetles which happen to live on the island. As a result, the sharper fang allele becomes representedwith high frequency in the island bats.All of the aboveNone of the above

Genetic drift is a mechanism of evolution which bring about chance effect that cause alterations in gene frequency . Genetic.drift is classified as :- I )Founder effect II ) Bottleneck effect Bottleneck effect is a phenomenon of genetic drift in which population is died due to natural calamities or disaster but small chunks of individuals refer to as survivor individual survive. In this case , penguin Possess two types of beaks : short and long beaks . Long beak penguins are much more efficient in catching prey . But , storm removes all long beak individuals from main population. So , it is a type of Bottleneck effect . Hence , option ( b ) is correct option Option ( a ) is incorrect :- Natural calamities / disaster like earthquake , drought bring about bottleneck effect . Option ( c ) is incorrect ,:- Seperation of group of bats from big population to mainland is an examination of gene flow . Option ( d ) is incorrect :- Only option ( b ) is correct option while other are incorrect . Option ( e ) is incorrect :- From the options , only option ( b ) is correct option while all other are incorrect.