Question

which sentence uses dashes correctly?
○ uluru is also known as ayers rock—it is a large sandstone formation in central australia.
○ australia is home to some unusual animals such as kangaroos—wallabies—koalas—kookaburras.
○ ballaratone is of the centers of the 19th - century australian gold rush and gold is still being mined—today.
○ sydney draws visitors from all around the world to see its iconic architectural masterpiece—the sydney opera house.

Explanation:

Dashes are used to set off parenthetical information, emphasize a point, or introduce a clarification/definition.

1. The first sentence uses a dash incorrectly; a comma or period would be better here, as the clause is a direct continuation, not an interrupting clarification.
2. The second sentence misuses dashes in a list; commas should separate items in a simple list instead.
3. The third sentence places a dash incorrectly before "today," which disrupts the logical flow of the sentence.
4. The fourth sentence uses a dash correctly to introduce a specific example (the Sydney Opera House) that clarifies the "iconic architectural masterpiece" mentioned earlier.

Answer:

D. Sydney draws visitors from all around the world to see its iconic architectural masterpiece—the Sydney Opera House.