Consider the following scenario and an aquatic bird population some birds have long legs, other birds have short legs, the food supplies minimal the birds with long legs are able to walk further into the water where they can find fish overtime. The bird is long legs to become more common with scientific term best describes this scenario.

This scenario can be best described by the term "natural selection." Natural selection is the process by which organisms that are better adapted to their environment are more likely to survive and reproduce, passing on their favorable traits to future generations. In this case, long-legged birds have a selective advantage due to their ability to access food sources that the short-legged birds cannot reach, leading to their increased frequency in the population over time.