Final answer:
An adaptation is a characteristic that helps an organism become better suited to its environment. It can be a genetic, physiological, or cultural change that enhances an organism's ability to survive and reproduce. For example, a moth's tongue length is an adaptation that allows it to feed from specific flowers.
Step-by-step explanation:
An adaptation refers to a characteristic or trait that helps an organism become better suited to its environment. It can be a genetic variation, physiological change, or cultural change. Adaptations are important in helping organisms survive and reproduce by enhancing their ability to fit into and thrive in their environment. For example, a moth's tongue length matching the size of the flower it feeds from is an adaptation that aids in its nectar-feeding.