👉 Fittest is a concept in evolutionary biology that refers to individuals or species that are most adapted to their environment. It is often used to describe animals, but it can also be applied to humans and other organisms. In the context of evolutionary biology, fittest means that an organism has evolved the traits necessary for survival and reproduction in its environment. This includes physical attributes such as strength, speed, endurance, and agility, as well as behavioral traits such as intelligence, adaptability, and social behavior.