Natural selection is the trait that possesses heritable variation and must confer an advantage in the competition for resources is selected naturally. Adaptive radiation is an evolutionary process giving rise to new species adapted to new habitats and ways of life. Genetic drift is a change in allele frequency in a population, due to random selection of genes. In the concept of evolution, convergent evolution results, where although the organisms that are not closely related, evolve independently having similar traits and showing adaptations to similar environment or ecological niche.