Evolutionary change requires adaptive traits, which are heritable traits that enhance an individual's fitness?

Heritable traits that enhance fitness are traits that boost their chances of survival.

Explanation:

Darwinian fitness, the survival of the fittest, says essentially animals with the most beneficial traits tend to out-compete others without the trait. A lot of factors influence how well they compete, but some heritable traits for animals include camouflage (color), limb adaptation, and speed.