Allele frequency is the probability of the gene in a particular population. The consistently changing allele frequency in a population depicts the process of evolution. Thus, option D is correct.
Evolution is the modification in the transitional or the expansion of the inherited characters passed from the parent to the offspring and successive generations over time through reproductive methods.
The allele or the gene frequency defines the evolutionary pattern as the alleles carry and express the characteristics that were passed. Due to environmental changes, the alleles can get modified for better adaptation.
This adaptation and natural selection allow the organism to evolve from the pre-existing species to adapt and with better traits that enable their survival.
Therefore, option D. the changing frequency depicts the evolving population.
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