Why is a natural phenomenon introduced in the notes?

• A. To prove the phenomenon is a myth.
• B. To describe a well-established scientific fact.
• C. To illustrate an unrelated concept.
• D. To refute two explanations and present a third plausible explanation.

Answer: (D)

When notes introduce a natural phenomenon, the goal is to show how ideas are tested against evidence and how explanations are weighed. The best choice captures this by showing the writer refutes two explanations and then offers a third plausible one, illustrating how evidence narrows possibilities to a credible interpretation. This mirrors scientific reasoning: you compare competing ideas, discard the ones that don’t fit the data, and propose a reasoned explanation that aligns with what is observed. It isn’t about declaring the phenomenon a myth, nor merely stating an established fact, nor describing something unrelated. Instead, it demonstrates the process of evaluating explanations to arrive at a reasonable understanding.