LIFE SCIENCE

Detailed explanation-1: -natural selection is incorrect as it is the process with the help of which species adapt to the new environment by changing the genetic makeup. It does not introduce new alleles into the population.

Detailed explanation-2: -As natural selection works on a population, the gene pool changes. The favorable adaptations become more plentiful within the gene pool, and the less desirable traits become less prevalent or may even disappear from the gene pool altogether.

Detailed explanation-3: -Non-random mating. Non-random mating won’t make allele frequencies in the population change by itself, though it can alter genotype frequencies.