Natural selection drives the increase of adaptive traits in a population.
Natural selection is the mechanism of evolution where advantageous traits become more common in a population. This occurs when individuals with traits that aid in survival and reproduction are more likely to pass those traits on to the next generation.
Adaptive traits can be structural (like bird beaks suited for different diets), behavioral (like mating dances), or physiological (like resistance to diseases). These traits increase an organism's fitness in its environment.
For example, in a population of birds, those with beaks better suited for cracking seeds will have higher reproductive success, leading to an increase in the frequency of that advantageous trait over time.
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