Expression of IdeasEasy–MediumEmphasising a contrast in lifespan
Expression of Ideas practice question
While researching a topic, a student has taken the following notes:
- An adult mayfly lives for about one day.
- A Greenland shark can live for more than 400 years.
- Mayflies spend up to two years as larvae underwater before becoming adults.
- Greenland sharks live in cold Arctic waters.
The student wants to emphasise the contrast between the two animals' adult lifespans. Which choice most effectively uses relevant information from the notes to accomplish this goal?
- A. An adult mayfly lives about a day, while a Greenland shark may live for more than 400 years.Correct
- B. An adult mayfly lives for about one day.
- C. Mayflies spend up to two years underwater as larvae.
- D. Mayflies live far longer than Greenland sharks.
Answer: A. An adult mayfly lives about a day, while a Greenland shark may live for more than 400 years.
Both lifespans side by side — choice A makes the contrast.
Why the other answers are wrong
- B. An adult mayfly lives for about one day.
- One lifespan gives nothing to compare.
- C. Mayflies spend up to two years underwater as larvae.
- This is about larvae, not adult lifespan, and doesn't mention the shark.
- D. Mayflies live far longer than Greenland sharks.
- This reverses the notes.
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