Question

read the passages.
passage 1
stonehenge is a prehistoric monument in southern england that was built more than 5,000 years ago. the monument consists of huge stones arranged in circles. the circles are made of sandstone columns. a ten-foot stone lies across the top of each pair of columns, forming the shape of a door. in the center of the monument is a circle of smaller stones called bluestones.
near the main structure is a special stone called the heel stone. on the morning of the solstice, the sun rises directly over the heel stone. this placement shows that stonehenge most likely was used as a scientific observatory. the arrangement of stones in relation to the stars might also have allowed people to predict solar eclipses.
nobody knows for sure how the heavy stones were transported to the site. people may have dragged them there, or glaciers may have moved the stones closer to the site. today, the nearest source of sandstone is 19 miles away, and bluestones are located nearly 250 miles away.
which statement explains how the authors present a key idea differently?

1. the author of passage 1 thinks that stonehenge was an observatory, while the author of passage 2 thinks that stonehenge was a holy site.
2. the author of passage 1 thinks stonehenge was built by prehistoric humans, while the author of passage 2 thinks that stonehenge was built by the celts in about 750 bc.
3. the author of passage 1 thinks that the stones of stonehenge were dragged over land, while the author of passage 2 thinks the stones were transported by glaciers or through water.
4. the author of passage 1 thinks that the heel stone of stonehenge had an astronomical purpose, while the author of passage 2 thinks that the heel stone served as a tombstone in a burial ground.

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Explanation:

To solve this, we analyze each option:

• Option 1: Passage 1 talks about observatory, but there's no info on Passage 2 thinking it's a holy site. Eliminate.
• Option 2: Passage 1 says prehistoric (5000+ years ago), Passage 2 (not shown here) likely doesn't say Celts (750 BC is too late for prehistoric). Eliminate.
• Option 3: Passage 1 says "people may have dragged" or "glaciers may have moved" (uncertain). If Passage 2 says transport by glaciers or water, this matches differing ideas on stone transport.
• Option 4: Passage 1 talks about Heel Stone's astronomical purpose, but no info on Passage 2 thinking it's a tombstone. Eliminate.

Answer:

1. The author of Passage 1 thinks that the stones of Stonehenge were dragged over land, while the author of Passage 2 thinks the stones were transported by glaciers or through water.