Natural selection is one of the primary mechanisms of evolution, where individuals with advantageous traits are more likely to survive and reproduce. Over time, these beneficial traits become more common in the population, influencing the evolutionary trajectory of species. Consider a scenario where a population of beetles varies in color: some are green and some are brown. In an environment with mostly brown soil, predators are more likely to spot the green beetles. How will this affect the evolutionary characteristics of the beetle population over time?