Final answer:
Adaptations in ducks help them survive and reproduce.
Step-by-step explanation:
All living organisms exhibit a fit to their environment. Biologists refer to this fit as adaptation, and it is a consequence of evolution by natural selection. Examples of adaptations include heat-resistant Archaea and the tongue length of a nectar-feeding moth. Adaptations enhance the reproductive potential of individuals, helping them survive and reproduce. As their environment changes, natural selection causes individuals to develop characteristics that are better suited to the new conditions.