How do you know a specie is evolving?

A species is considered to be evolving when there are observable changes in its genetic makeup over generations, often evidenced by variations in traits that enhance survival or reproduction. This can be assessed through mechanisms such as natural selection, genetic drift, or mutations. Additionally, observable shifts in behavior, morphology, or physiology in response to environmental changes can indicate evolutionary processes at work. Genetic studies that reveal changes in allele frequencies over time also support the notion of evolution within a species.