Solution
✅ Correct Option: 2
Option 2 (purify the air) is correct.
The passage suggests that because ferns and palms are extremely ancient plants (they've existed for millions of years), they have had a very long time to develop and perfect their ability to clean the air. Think of it like practice — the longer you practice something, the better you get at it! These plants have been "practicing" air purification for millions of years, making them especially good at it.
Why not the other options?
- Option 1 (live long): The passage connects their antiquity to air purification, not to how long individual plants survive.
- Option 3 (grow leaves that live long): The passage makes no connection between their ancient history and the lifespan of their leaves.
- Option 4 (react successfully in research experiments): The passage does not link their ancient history to how they perform in lab settings.
More from this passage:
Question 41
Question 43
Question 45