A fraction of the original green frog population survives to reproduce and generate the new population.If the survivors of the original population survived by chance,then this event is an example of

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This scenario describes genetic drift, which is the random fluctuation of gene frequencies in a small population due to chance events such as a natural disaster or, in this case, only a fraction of the original population surviving. Natural selection refers to the process by which certain traits are selected for or against based on their survival or reproductive advantages. Founder effect refers to a small group of individuals starting a new population with a limited set of genetic variations. Industrial melanism refers to a specific example of natural selection where darker pigmentation is advantageous in polluted environments.

A Fraction of the Original Green Frog Population Survives to Reproduce