Answer :
Final answer:
Evolution is the process that explains structural and physiological changes within a species over time due to natural selection.
Explanation:
Evolution is the concept that best describes the structural and physiological changes within a species over an extended period of time. These changes are the result of natural selection favoring traits that contribute to an individual's reproduction and survival within a specific environment.
Learn more about Evolution here:
https://brainly.com/question/40375447