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—kookabur ras. 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.

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

Explanation:

A dash is a grammatical symbol which consists of a horizontal line located inside of a sentence. It should not be confused with a hyphen, which is used to separate words, such as in the word "e-mail". Among the several functions of a dash there is the emphatic function, in which it can be used to replace colons such as in the example stated here. The version with colons would be the following:

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

they both lost a woman they loved named lenore

they believed they interracted with a talking raven

they became orphaned at a young age.