The following text discusses a recent study on sleep.
Researchers have discovered that adequate sleep improves memory consolidation. During deep sleep, the brain replays experiences from the day, strengthening neural connections. This process helps transfer information from short-term to long-term memory, which explains why students who sleep well before exams often perform better.
Which choice best describes the function of the last sentence in the text?
It introduces a new topic unrelated to the main discussion.
It contradicts the claims made earlier in the passage.
It provides a practical example that illustrates the main point.
It questions the validity of the research findings.
Correct Answer: C
Choice C is the best answer. The last sentence gives a practical example (students performing better on exams) that illustrates why sleep aids memory consolidation.
- Evidence: The previous sentences explain the mechanism of memory consolidation. The last sentence says "which explains why students... perform better."
- Reasoning: The student example applies the abstract concept of memory consolidation to a real-world scenario.
- Conclusion: The function is to provide an illustrative example.
💡 Strategy: Determine the relationship between the last sentence and the preceding text (it applies the concept).
Choice A is incorrect because the example directly relates to memory. Choice B is incorrect because it supports, not contradicts, the claims. Choice D is incorrect because it reinforces rather than questions the findings.