[Solved] The reproductive advantage enjoyed by organisms best suited to a particular environment is known as A) erotic plasticity. B) exhibitionism. C) natural selection. D) the older-brother effect. Peristalsis: The series of wave-like muscle contractions that moves food through the digestive tract. Hydrolysis: Hydrolysis is a chemical reaction in which water is used to break down the bonds of a compound, often splitting molecules into two or more smaller substances. Alkaline Mucus: A type of mucus that has a higher pH and helps protect mucosal linings from acidic conditions. Epithelial Cells: Specialized cells that line the surfaces of organs, vessels, and cavities in the body, serving as a protective barrier and involved in absorption, secretion, and sensation.