What constitutes an adaptation in organisms?

An adaptation refers to a genetic trait that has evolved in a species over time, providing a survival advantage in a specific environment. This trait can be structural, physiological, or behavioral and is typically the result of the processes of natural selection. Organisms with adaptations are more likely to survive, reproduce, and pass those advantageous traits to their offspring.

For instance, certain animals may develop thicker fur in cold climates, enabling them to retain heat. This genetic basis of adaptations contrasts with other options that focus on learned behaviors or cultural practices, which do not involve heritable genetic changes. Therefore, a genetic trait that conveys a survival advantage is a clear representation of biological adaptation.