Information and IdeasEasy–MediumMain idea of an informational text
Information and Ideas practice question
Dry-stone walls are built without mortar, and that is why they last. A mortared wall cracks when the ground beneath it shifts, while a dry wall settles with the ground, each stone finding a new resting place.
Which choice best states the main idea of the text?
- A. Dry-stone walls endure because, having no mortar, they can settle with the ground instead of cracking.Correct
- B. Mortared walls are stronger than dry walls.
- C. Dry-stone walls are difficult to build.
- D. The ground never shifts under a wall.
Answer: A. Dry-stone walls endure because, having no mortar, they can settle with the ground instead of cracking.
No mortar, so the wall moves with the ground.
Why the other answers are wrong
- B. Mortared walls are stronger than dry walls.
- The text says mortared walls crack.
- C. Dry-stone walls are difficult to build.
- Difficulty is not discussed.
- D. The ground never shifts under a wall.
- The text assumes the ground shifts.
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