The answer to this question is C. Depressants
Answer:
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Explanation:
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Choice C. Educated guess or a prediction that can be tested, based on limited evidence.
The limbs of the organisms are similar because they are formed in similar ways during embryonic development and share similar arrangements.
Ecosystems experience change through human activity and natural events. This is because human activity can impact changes in nature, like climate for example. As a result, ecosystems change in response to the change in nature or natural events, which was caused by human activities. They are interrelated so to speak.