Final answer:
Natural selection results in the development of adaptations, changes in genetic frequencies within a population, and a higher likelihood of having more offspring.
Step-by-step explanation:
Natural selection, a key mechanism of evolution, produces several results. These include the development of adaptations that help individuals survive and reproduce, such as better running speed. Additionally, natural selection acts on the population's heritable traits, selecting for beneficial alleles and increasing their frequency, while selecting against deleterious alleles and decreasing their frequency over time. Lastly, individuals with advantageous traits are more likely to have more offspring, leading to a shift in genetic frequencies within the population.