One example of natural selection occurring is the evolution of antibiotic-resistant bacteria. The excessive use of antibiotics has created an environment that favors the survival and reproduction of bacteria that are resistant to these drugs. As a result, over time, the population of antibiotic-resistant bacteria has increased while the population of susceptible bacteria has decreased. This is an example of directional selection, where a particular trait (in this case, antibiotic resistance) becomes more common in a population over time.
Another example of natural selection is the evolution of beak size and shape in Darwin's finches. In times of drought, the availability of seeds decreases, and larger, tougher seeds become more common. In response, finches with larger, stronger beaks are better able to crack open these seeds and survive, while those with smaller, weaker beaks are less successful. This is an example of disruptive selection, where extreme forms of a trait are favored over intermediate forms.
There you go