Use the concept of natural selection to explain why organisms typically adapt over time.

If there is a trait that is more fit for the environment (such as a thick fur coat for cold climates; black skin for dark environments), the organism obtaining that trait will be more successful in survival, therefore reproducing, and will be able to pass on their genes. Over a long period of time, this trait will eventually become common among that specific population of a species.

some of your causes might be acidic rain or natural wildfires that cause the parks to be degraded

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age range would be the answer