An is a trait that increases an organism's fitness (ability to produce viable offspring). **check your spelling before your submit. partial credit will not be given for misspelled answers.**

This would be an adaptation. These changes allow the organism to have a higher level of evolutionary fitness compared to other members of the species, and thereby propagate their genes to the next generation more readily. Through these adaptations, and organism can make changes that will allow it to survive in areas where they, normally, would perish.