Some species of penguins, such as chinstrap penguins, depend on open water for their survival. Other species of penguins, such as Adélie penguins, depend on ice. Over the last 20 years, the population size of chinstrap penguins has increased, and the population size of Adélie penguins has decreased. Which of the following most likely caused these changes in population size? A. an increase in landmass and shorelines B. an increase in global air and water temperatures C. a decrease in the number of leopard seal predators D. a decrease in the length of time before chicks take to sea
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