As some fish populations have declined, seabirds called puffins have switched their diet from fatty, high-quality fish to lean, low-quality fish. at the same time, survival rates of nestlings (baby puffins) have decreased. these observations led to the "junk food hypothesis," the idea that replacement of high-quality fish with low-quality fish (the "junk food") decreases nestling growth. to test this hypothesis, researchers measured the weight of puffin nestlings fed either high-quality fish (herring or capelin) or low-quality fish (pollock) for 2020 daysd, a, y, s. the results are shown in the graph above. by day 2020, the average weight of puffins fed either herring or capelin was significantly greater than the average weight of puffins fed pollock. do the results of the study support the "junk food" hypothesis?
yes; by the end of the study, puffins fed low-quality fish had a lower weight than those fed high-quality fish.
no; puffins fed high-quality fish still had the highest weight at the end of the study
no; the researchers did not test any junk food
yes; puffins fed low-quality and high-quality fish all had the same weight at the end of the study.